Annual report pursuant to Section 13 and 15(d)

4. Stock-Based Compensation (Details)

v3.3.1.900
4. Stock-Based Compensation (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Summarizes the stock option activity    
Outstanding Beginning Balance, Number of Options 607,877 351,439
Granted, Number of Options 614,730 283,440
Forfeitures, Number of Options (53,280) (14,439)
Expirations, Number of Options (11,076) (12,563)
Outstanding Ending Balance, Number of Options 1,158,251 607,877
Exercisable Ending Balance, Number of Options 351,988  
Outstanding Beginning Balance, Weighted Average Exercise Price $ 8.00 $ 16.29
Granted, Weighted Average Exercise Price 2.44 3.92
Forfeitures, Weighted Average Exercise Price 3.81 4.40
Cancelled or expired, Weighted Average Exercise Price 32.71 150.73
Outstanding Ending Balance, Weighted Average Exercise Price 4.96 $ 8.00
Exercisable Ending Balance, Weighted Average Exercise Price $ 4.96  
Weighted Average Remaining Contractual Life (in years) Outstanding 8 years 5 months 5 days 7 years 9 months 22 days
Weighted Average Remaining Contractual Life (in years) Exercisable 6 years 4 months 24 days 8 years 29 days