Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Restricted Stock Award Activity (Details)

v3.19.1
Stock-Based Compensation - Restricted Stock Award Activity (Details)
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Restricted Stock  
Outstanding, end of year (in shares) 1,571,864
Restricted Stock  
Restricted Stock  
Outstanding, beginning of year (in shares) 1,071,538
Granted (in shares) 1,664,266
Exercised (in shares) 641,843
Forfeited (in shares) 522,097
Outstanding, end of year (in shares) 1,571,864
Weighted Average Fair Value  
Outstanding, beginning of year (in usd per share) | $ / shares $ 1.84
Granted (in usd per share) | $ / shares 0.76
Exercised (in usd per share) | $ / shares 2.26
Forfeited (in usd per share) | $ / shares 1.04
Outstanding, end of year (in usd per share) | $ / shares $ 0.79