Stockholders' Equity (Narrative) (Details) - USD ($)
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1 Months Ended |
6 Months Ended |
9 Months Ended |
12 Months Ended |
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Nov. 20, 2015 |
Oct. 31, 2015 |
Sep. 30, 2015 |
Sep. 04, 2015 |
Aug. 31, 2015 |
Aug. 12, 2015 |
Jul. 31, 2015 |
Apr. 09, 2015 |
Apr. 08, 2015 |
Nov. 12, 2014 |
May. 05, 2014 |
Nov. 20, 2015 |
May. 31, 2015 |
Apr. 30, 2015 |
Jun. 30, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Sep. 30, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2011 |
Jun. 11, 2015 |
Jul. 17, 2006 |
Common Stock, Shares Authorized |
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500,000,000
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500,000,000
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500,000,000
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Common Stock, Shares, Outstanding |
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18,082,874
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18,628,957
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18,082,874
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Class of Warrant or Right, Outstanding |
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4,886,764
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4,886,764
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4,886,764
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Number of options outstanding |
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2,026,564
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1,564,257
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5,236,909
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2,026,564
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Number of options vested and expected to vest outstanding |
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1,564,257
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3,442,023
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1,564,257
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Aggregate intrinsic value |
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$ 0
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$ 0
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$ 0
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Unrecognized compensation costs |
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$ 1,200,000
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Weighted average recognition period |
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2 years 1 month 6 days
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Restricted stock grants estimated forfeiture amount |
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1.50%
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Share based compensation |
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$ 1,881,326
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$ 282,276
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Equity Issuance, Per Share Amount |
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$ 0.92
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Common Stock issued |
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18,082,874
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18,628,957
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18,082,874
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Proceeds from Issuance of Common Stock |
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$ 171,500
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$ 4,753,326
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Amount allocated from the Offering to warrants |
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$ 0
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$ 4,416,000
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Stock options granted |
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3,491,419
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579,429
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Fair value of stock options granted |
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$ 10.61
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$ 10.61
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$ 10.61
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Vested shares, value |
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$ 1,727,000
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$ 171,000
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Stock options granted |
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3,491,419
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Stock issued for compensation for commitment, shares |
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300,000
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Stock issued for compensation for commitment, amount |
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$ 276,000
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Approximations [Member] |
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Stock option expense |
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$ 1,881,000
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$ 262,000
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Share based compensation |
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$ 300,000
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Chief Executive Officer [Member] |
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Non-qualified stock options |
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1,641,432
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November 12, 2014 Offering [Member] |
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Proceeds from Issuance of Common Stock |
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$ 5,000,000
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Common stock and warrants sold |
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$ 2,878,516
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Common stock to be purchased in the Offering |
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2,734,590
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Shares of common stock to be purchased by fixed combination |
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0.95
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Purchase price of fixed combination |
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$ 1.75
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Warrant exercise price |
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$ 2.31
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November 12, 2014 Offering [Member] | Approximations [Member] |
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Net proceeds from the Offering received after payments of fees and expenses |
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$ 4,500,000
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Issued to Investors on July 28, 2010 [Member] |
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Class of Warrant or Right, Outstanding |
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1,034,996
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1,034,996
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1,034,996
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Common stock to be purchased in the Offering |
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1,034,996
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Warrant exercise price |
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$ 9.00
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Issued to Investors on October 25, 2013 [Member] |
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Class of Warrant or Right, Outstanding |
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1,117,178
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1,117,178
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1,117,178
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Common stock to be purchased in the Offering |
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1,250,000
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Warrant exercise price |
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$ 2.30
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Issued to Investors on November 17, 2014 [Member] |
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Class of Warrant or Right, Outstanding |
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2,734,590
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2,734,590
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2,734,590
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Common stock to be purchased in the Offering |
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2,734,590
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Warrant exercise price |
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$ 2.31
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2006 Stock Plan [Member] |
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Non-qualified stock options |
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8,368
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2015 Equity Incentive Plan [Member] | Directors [Member] |
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Contractural lives |
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10 years
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Expected term |
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5 years 6 months
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Expected dividends |
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$ 0
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2015 Short-Term Non-Qualified Option Grants [Member] |
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Non-qualified stock options |
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8,255
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1,803
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1,536
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1,812
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1,129,135
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9,752
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Lower Limit |
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0.25
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Upper Limit |
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0.91
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Strike Price |
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1.26
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$ 0.92
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Expected dividends |
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$ 0
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2015 Long-Term Incentive Option Grants [Member] | Employees and Consultants [Member] |
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Contractural lives |
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10 years
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Expected term |
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6 years
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Stock options granted |
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79,588
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Pre-vesting forfeiture rate |
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1.50%
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Expected dividends |
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$ 0
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Stock options granted |
661,222
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550,972
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2015 Long-Term Incentive Option Grants [Member] | Directors [Member] |
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Non-qualified stock options |
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23,024
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112,996
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97,988
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ATM Offering [Member] |
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Common Stock issued |
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246,083
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Proceeds from Issuance of Common Stock |
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$ 282,000
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Issuance of 255,202 non-qualified 10 year options [Member] |
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Non-qualified stock options |
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255,202
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Contractural lives |
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10 years
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Lower Limit |
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$ 4.50
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Upper Limit |
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14.40
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Registered Direct Offering and Outstanding Warrants [Member] |
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Equity Issuance, Per Share Amount |
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$ 2.30
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Common Stock issued |
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132,822
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Proceeds from Issuance of Common Stock |
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$ 306,000
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May 5, 2014 Stock Options Granted [Member] |
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Volitility rate |
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90.44%
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Risk-free interest rate |
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1.68%
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Dividend yield |
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0.00%
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Expected term |
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5 years
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Strike Price |
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$ 2.55
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Stock options granted |
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579,429
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Fair value of stock options granted |
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$ 1.79
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Fair market value on measurement date |
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$ 0.52
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Pre-vesting forfeiture rate |
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1.50%
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Issuance of 4,517,259 non-qualified 5 - 10 year options [Member] |
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Non-qualified stock options |
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4,517,259
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Lower Limit |
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|
|
$ 0.83
|
|
|
|
|
Upper Limit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 23.85
|
|
|
|
|
Issuance of 464,448 non-qualified 3 - 10 year options [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Non-qualified stock options |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
464,448
|
|
|
|
|
Lower Limit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.92
|
|
|
|
|
Upper Limit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 15.30
|
|
|
|
|
Equity Purchase Agreement [Member] | Aspire Capital [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common stock reserved for issuance |
|
|
|
3,600,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nasdaq 20% Rule |
|
|
|
Requires shareholder approval of a transaction other than a public offering involving the sale, issuance, or potential issuance by a company of common stock (or securities convertible into or exercisable for common stock) equal to 20% or more of the common stock, or 20% or more of the voting power outstanding before the issuance for less than the greater of book or market value of the stock.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common stock, purchase commitment amount |
|
|
|
$ 10,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common stock purchase amount, per business day |
|
|
|
100,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common stock purchase amount, per business day, value |
|
|
|
$ 250,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Percentage of aggregate shares of the Company's common stock to be purchased |
|
|
|
30.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Percentage of purchase price per share, pursuant to VWAP |
|
|
|
95.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Minimum [Member] | Chief Executive Officer [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 month 6 days
|
|
|
|
|
Minimum [Member] | Directors, Officers and Employees [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7 months 6 days
|
|
|
|
|
Minimum [Member] | November 12, 2014 Offering [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Maximum common stock ownership to be eligible for exercise of warrants |
|
|
|
|
|
|
|
|
|
4.99%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Minimum [Member] | 2015 Equity Incentive Plan [Member] | Directors [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Volitility rate |
|
|
|
|
|
|
|
|
86.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
1.46%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fair value of stock options granted |
|
|
|
|
|
|
|
|
$ 0.65
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Minimum [Member] | 2015 Short-Term Non-Qualified Option Grants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
3 years
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
0.55%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dividend yield |
|
|
|
|
|
|
|
|
76.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Expected term |
|
|
|
|
|
|
|
|
1 year 6 months
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
|
|
|
$ 1.00
|
|
|
|
|
|
|
|
|
$ 0.83
|
|
|
|
|
|
Minimum [Member] | 2015 Long-Term Incentive Option Grants [Member] | Employees and Consultants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Volitility rate |
|
|
|
|
|
|
|
|
86.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
1.55%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
|
|
|
$ 0.92
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fair value of stock options granted |
|
|
|
|
|
|
|
|
0.67
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fair market value on measurement date |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.69
|
|
|
|
|
Minimum [Member] | 2015 Long-Term Incentive Option Grants [Member] | Directors [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
|
|
|
$ 0.92
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Minimum [Member] | Issuance of 4,517,259 non-qualified 5 - 10 year options [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5 years
|
|
|
|
|
Minimum [Member] | Issuance of 464,448 non-qualified 3 - 10 year options [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3 years
|
|
|
|
|
Maximum [Member] | Chief Executive Officer [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
9 years 10 months 24 days
|
|
|
|
|
Maximum [Member] | Directors, Officers and Employees [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10 years
|
|
|
|
|
Maximum [Member] | November 12, 2014 Offering [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Maximum common stock ownership to be eligible for exercise of warrants |
|
|
|
|
|
|
|
|
|
19.99%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Maximum [Member] | 2015 Equity Incentive Plan [Member] | Directors [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Volitility rate |
|
|
|
|
|
|
|
|
87.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
1.79%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
|
|
|
$ 1.26
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fair value of stock options granted |
|
|
|
|
|
|
|
|
$ 0.88
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Maximum [Member] | 2015 Short-Term Non-Qualified Option Grants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
10 years
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
1.92%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dividend yield |
|
|
|
|
|
|
|
|
88.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Expected term |
|
|
|
|
|
|
|
|
5 years
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
|
|
|
$ 1.25
|
|
|
|
|
|
|
|
|
$ 1.25
|
|
|
|
|
|
Maximum [Member] | 2015 Long-Term Incentive Option Grants [Member] | Employees and Consultants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Volitility rate |
|
|
|
|
|
|
|
|
87.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
1.87%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
|
|
|
$ 1.26
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fair value of stock options granted |
|
|
|
|
|
|
|
|
$ 0.91
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fair market value on measurement date |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.72
|
|
|
|
|
Maximum [Member] | ATM Offering [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total fundraising limit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 5,800,000
|
|
Maximum [Member] | Issuance of 4,517,259 non-qualified 5 - 10 year options [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10 years
|
|
|
|
|
Maximum [Member] | Issuance of 464,448 non-qualified 3 - 10 year options [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractural lives |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10 years
|
|
|
|
|
Employee Stock Option [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Volitility rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
86.66%
|
|
90.44%
|
|
|
Risk-free interest rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.64%
|
|
1.68%
|
|
|
Dividend yield |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.00%
|
|
0.00%
|
|
|
Expected term |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5 years 4 months 17 days
|
|
5 years
|
|
|
Stock and Stock Equivalents [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common Stock, Shares, Outstanding |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
24,996,202
|
|
|
28,752,630
|
24,996,202
|
|
|
|
Stock Compensation Plan [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common Stock, Capital Shares Reserved for Future Issuance |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3,000,000
|
Maximum restricted shares granted [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common Stock, Capital Shares Reserved for Future Issuance |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(1,500,000)
|
Stock-based compensation [Member] | Approximations [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share based compensation |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 1,900,000
|
$ 300,000
|
|
|
|
2006 Stock Plan [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Non-qualified stock options |
|
|
|
|
|
|
|
|
|
|
|
|
1,775
|
2,981
|
1,310
|
|
|
|
|
|
|
|
|
2006 Stock Plan [Member] | 2015 Short-Term Non-Qualified Option Grants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Non-qualified stock options |
|
|
|
|
|
|
|
47,017
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006 Stock Plan [Member] | 2015 Short-Term Non-Qualified Option Grants [Member] | Employees and Consultants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Non-qualified stock options |
|
|
|
|
|
|
|
|
463,192
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2015 Equity Incentive Plan [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Non-qualified stock options |
|
|
|
|
|
135,880
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Strike Price |
|
|
|
|
|
$ 1.26
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2015 Equity Incentive Plan [Member] | 2015 Short-Term Non-Qualified Option Grants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Non-qualified stock options |
|
|
|
|
|
|
|
3,968
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2015 Equity Incentive Plan [Member] | 2015 Short-Term Non-Qualified Option Grants [Member] | Employees and Consultants [Member] |
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
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|
Non-qualified stock options |
|
|
|
|
|
|
|
|
148,845
|
|
|
|
|
|
|
|
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