Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock-Based Compensation (Details 3)

v3.19.1
Stockholders' Equity and Stock-Based Compensation (Details 3) - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Beginning of the period 5,604,154  
End of the year 5,342,192 5,604,154
Weighted Average Exercise Price Beginning of the period $ 2.72  
Weighted Average Exercise End of the yea 2.59 $ 2.72
Weighted Average Exercise Price Options exercisable $ 3.36 $ 3.50
Performance-based stock options [Member]    
Beginning of the period 5,604,154 3,976,884
Granted 1,784,455
Exercised
Forfeited (215,598) (143,980)
Expired (46,364) (13,205)
End of the year 5,342,192 5,604,154
Options exercisable 3,673,176 3,935,138
Weighted Average Exercise Price Beginning of the period $ 2.72 $ 3.58
Weighted Average Exercise Price Stock Options Granted 0.90
Weighted Average Exercise Price Stock Options Exercised
Weighted Average Exercise Price Stock Options Forfeited 2.44 1.10
Weighted Average Exercise Price Stock Options Expired 19.10 30.60
Weighted Average Exercise End of the yea 2.59 2.72
Weighted Average Exercise Price Options exercisable 3.36 3.50
Weighted Average Fair Value Stock Options Beginning of the period 1.96 2.49
Weighted Average Fair Value Stock Options Granted 0.70
Weighted Average Fair Value Stock Options Exercised
Weighted Average Fair Value Stock Options Forfeited 1.75 0.83
Weighted Average Fair Value Stock Options Expired 18.47 21.13
Weighted Average Fair Value Stock Options End of the yea 1.82 1.96
Weighted Average Fair Value Options exercisable $ 2.34 $ 2.49