Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Narrative) (Details)

v2.4.0.6
Stockholders' Equity (Narrative) (Details) (USD $)
 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Approximations [Member]
Dec. 31, 2011
Approximations [Member]
Dec. 31, 2012
Chief Executive Officer [Member]
Dec. 31, 2012
Issuance of 273,536 5-10 year options [Member]
Dec. 31, 2012
Issuance of 1,136,748 8-10 year options [Member]
Dec. 31, 2012
Issuance of 229,558 8-10 year options [Member]
Dec. 31, 2012
Unregistered Securities [Member]
Jul. 22, 2010
Registered Direct Offering and Outstanding Warrants [Member]
Jul. 22, 2010
Registered Direct Offering and Outstanding Warrants [Member]
Approximations [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Chief Executive Officer [Member]
Dec. 31, 2012
Minimum [Member]
Directors, Officers and Employees [Member]
Jul. 22, 2010
Minimum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Chief Executive Officer [Member]
Dec. 31, 2012
Maximum [Member]
Directors, Officers and Employees [Member]
Jul. 22, 2010
Maximum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
Dec. 31, 2012
Stock Compensation Plan [Member]
Dec. 31, 2012
Maximum restricted shares granted [Member]
Dec. 31, 2012
Maximum number of shares in respect to stock options [Member]
Dec. 31, 2012
Maximum restricted shares granted to one person [Member]
Dec. 31, 2012
Restricted Stock [Member]
Dec. 31, 2011
Restricted Stock [Member]
Dec. 31, 2012
Warrants [Member]
Common Stock, Shares Authorized 500,000,000 500,000,000                                                  
Common Stock, Shares, Outstanding 12,526,240 12,427,220                                                  
Common stock reserved for issuance 2,264 17,120                                                  
Class of Warrant or Right, Outstanding 1,034,996                                                    
Number of options outstanding 1,639,842 1,674,065 1,772,348                                                
Unvested Shares                                                 43,032 120,021  
Issued but unvested restricted stock                                                 14,446    
Total stock and stock equivalents outstanding 15,246,374                                                    
Common Stock, Capital Shares Reserved for Future Issuance                                         2,500,000 1,250,000 266,667 166,667      
Number of options vested and expected to vest outstanding 1,523,536 1,345,541                                                  
Stock option expense       $ 700,000 $ 1,000,000                                            
Non-qualified stock options           665,088 273,536 1,136,748 229,558                                    
Contractural lives                           2 years 10 months 24 days 2 years 10 months 24 days     8 years 2 months 12 days 8 years 3 months 18 days                
Lower Limit             $ 4.50 $ 5.42 $ 5.70                                    
Upper Limit             $ 14.40 $ 23.85 $ 19.20                                    
Aggregate intrinsic value 0 0                                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value $ 1.41 $ 2.04                                                  
Unrecognized compensation costs 100,000 400,000                                                  
Expected compensation cost       100,000                                              
Weighted average recognition period 1 year                                                    
Restricted stock grants estimated forfeiture amount                         14.00%       3.00%                    
Stock based compensation 975,421 1,513,021   1,000,000 1,500,000                                            
Common Stock issued 12,540,686 12,476,414               855                                  
Proceeds from Issuance of Common Stock 1,733 0               1,733   13,700,000                              
Common stock and warrants sold                     2,069,992                                
Common stock to be purchased in the Offering                     1,034,996                                
Shares of common stock to be purchased by fixed combination                     0.5                                
Purchase price of fixed combination                     6.60                                
Warrant exercise price                     $ 9.00                                
Maximum common stock ownership to be eligible for exercise of warrants                               4.99%       9.99%              
Net proceeds from the Offering received after payments of fees and expenses                       12,600,000                              
Amount allocated from the Offering to common stock                       9,000,000                              
Amount allocated from the Offering to warrants                       $ 3,600,000                              
Volitility rate                                                     99.00%
Risk-free interest rate                                                     2.37%
Dividend yield                                                     0.00%
Expected term                                                     7 years