XML 66 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation (Details 1) - Stock Options [Member] - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summary of all stock option plans / warrant activity      
Number of Shares/Warrants, Options outstanding, Beginning Balance 1,846,000 2,184,117 1,709,400
Number of Shares, Options granted 25,000 605,000
Number of Shares, Options exercised
Number of Shares, Options cancelled or expired (90,000) (363,117) (130,283)
Number of Shares/Warrants, Options outstanding, Ending Balance 1,756,000 1,846,000 2,184,117
Weighted Average Exercise Price, Options outstanding, Beginning Balance $ 4.39 $ 4.48 $ 4.92
Weighted Average Exercise Price, Options granted 1.44 3.57
Weighted Average Exercise Price, Options exercised
Weighted Average Exercise Price, Options cancelled or expired 8.21 4.73 6.03
Weighted Average Exercise Price, Options outstanding, Ending Balance $ 4.20 $ 4.39 $ 4.48
Options outstanding, Weighted Average Remaining Contractual Life (years) 2 years 2 months 5 days    
Options exercisable and expected to vest, Weighted Average Remaining Contractual Life (years) 2 years 2 months 5 days    
Options outstanding, Aggregate Intrinsic Value $ 10,000  
Options exercisable and expected to vest, Aggregate Intrinsic Value $ 10,000  
Number of Shares/Warrants, Options exercisable and expected to vest, Ending Balance 1,756,000    
Weighted Average Exercise Price, Options exercisable and expected to vest, Ending Balance $ 4.20 $ 4.39