Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Restricted Stock Activity (Details)

v3.19.1
Stock-Based Compensation - Restricted Stock Activity (Details) - Restricted Stock Units - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Number of Shares    
Non-vested, beginning balance (shares) 438,712 185,260
Shares granted (shares) 200,000 576,212
Shares vested (shares) 323,420 322,760
Non-vested, ending balance (shares) 315,292 438,712
Weighted Average Grant Date Fair Value    
Weighted average grant date fair value, beginning balance (in dollars per share) $ 2.28 $ 2.67
Shares granted (in dollars per share) 3.16 1.95
Shares vested (in dollars per share) 2.84 1.92
Weighted average grant date fair value, ending balance (in dollars per share) $ 2.26 $ 2.28