Lightbridge Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narrative) (Details)

Stockholders' Equity (Narrative) (Details) - USD ($)										1 Months Ended						3 Months Ended		6 Months Ended			9 Months Ended	12 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	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	Feb. 29, 2016	Jan. 31, 2016	Dec. 31, 2015	Nov. 20, 2015	May. 31, 2015	Apr. 30, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Dec. 31, 2015	Jun. 11, 2015	Jul. 17, 2006
Common Stock, Shares Authorized												500,000,000				500,000,000						500,000,000
Common Stock, Shares, Outstanding												18,628,957				20,828,957						18,628,957
Class of Warrant or Right, Outstanding												4,886,764				4,886,764						4,886,764
Number of options outstanding												5,236,909				5,052,409			2,026,564			5,236,909
Number of options vested and expected to vest outstanding												3,442,023				3,257,523						3,442,023
Aggregate intrinsic value												$ 0										$ 0
Unrecognized compensation costs																$ 1,000,000
Weighted average recognition period																1 year 11 months 16 days
Restricted stock grants estimated forfeiture amount																1.50%
Share based compensation																$ 185,456	$ 81,680
Equity Issuance, Per Share Amount																$ 0.92
Common Stock issued												18,628,957				20,828,957						18,628,957
Proceeds from Issuance of Common Stock																$ 1,396,339	$ 0
Stock options granted																55,500						3,491,419
Fair value of stock options granted												$ 4.06							$ 10.61			$ 4.06
Stock options granted																55,500						3,491,419
Stock issued for compensation for commitment, shares																300,000
Stock issued for compensation for commitment, amount																$ 276,000
Approximations [Member]
Stock option expense																			$ 0.2	$ 100,000
Chief Executive Officer [Member]
Non-qualified stock options																1,401,432
Aspire Capital [Member]
Common Stock issued																2,200,000
Proceeds from Issuance of Common Stock																$ 1,400,000
Issuance of 4,284,312 non-qualified 5 - 10 year options [Member]
Non-qualified stock options																4,284,312
Lower Limit																$ 0.56
Upper Limit																$ 15.00
Issuance of 512,895 non-qualified 3 - 10 year options [Member]
Non-qualified stock options																512,895
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%
2006 Stock Plan [Member]
Non-qualified stock options										18,305	14,805	8,368				22,390
2015 Equity Incentive Plan [Member] \| Directors [Member]
Contractural lives									10 years
Expected term									5 years 6 months
Expected dividends									$ 0
2015 Short-Term Non-Qualified Option Grants [Member]
Non-qualified stock options		8,255	1,803		1,536		1,812						1,129,135			9,752
Lower Limit									0.10
Upper Limit									0.86
Strike Price									1.26				$ 0.92
Expected dividends									$ 0
2015 Long-Term Incentive Option Grants [Member] \| Employees and Consultants [Member]
Contractural lives									10 years
Stock options granted						79,588
Pre-vesting forfeiture rate																1.50%
Expected dividends									$ 0
Stock options granted	661,222								550,972
2015 Long-Term Incentive Option Grants [Member] \| Directors [Member]
Non-qualified stock options						23,024			112,996							97,988
ATM Offering [Member]
Common Stock issued																246,083
Proceeds from Issuance of Common Stock																$ 282,000
Issuance of 255,202 non-qualified 10 year options [Member]
Non-qualified stock options																255,202
Contractural lives																10 years
Lower Limit																$ 4.50
Upper Limit																$ 14.40
Minimum [Member] \| Chief Executive Officer [Member]
Contractural lives																1 year 8 months 12 days
Minimum [Member] \| Directors, Officers and Employees [Member]
Contractural lives																3 months 18 days
Minimum [Member] \| Issuance of 4,284,312 non-qualified 5 - 10 year options [Member]
Contractural lives																5 years
Minimum [Member] \| Issuance of 512,895 non-qualified 3 - 10 year options [Member]
Contractural lives																3 years
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									0.42%
Dividend yield									76.00%
Expected term									1 year 6 months
Strike Price									$ 0.56												$ 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																$ 0.34
Minimum [Member] \| 2015 Long-Term Incentive Option Grants [Member] \| Directors [Member]
Strike Price									$ 0.92
Maximum [Member] \| Chief Executive Officer [Member]
Contractural lives																9 years 7 months 6 days
Maximum [Member] \| Directors, Officers and Employees [Member]
Contractural lives																10 years
Maximum [Member] \| Issuance of 4,284,312 non-qualified 5 - 10 year options [Member]
Contractural lives																10 years
Maximum [Member] \| Issuance of 512,895 non-qualified 3 - 10 year options [Member]
Contractural lives																10 years
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									1.76%
Dividend yield									89.00%
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																$ 0.36
Maximum [Member] \| ATM Offering [Member]
Total fundraising limit																							$ 5,800,000
Employee Stock Option [Member]
Volitility rate																84.54%						86.66%
Risk-free interest rate																0.69%						1.64%
Dividend yield																0.00%						0.00%
Expected term																1 year 11 months 8 days						5 years 4 months 17 days
Stock and Stock Equivalents [Member]
Common Stock, Shares, Outstanding												28,752,630				30,768,130						28,752,630
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																$ 200,000						$ 100,000
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]
Non-qualified stock options									148,845