Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Summary of Award Activity Under Restricted Stock Plan (Details)

v3.19.1
Stock-Based Compensation - Summary of Award Activity Under Restricted Stock Plan (Details) - Restricted Stock [Member] - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Number of Non-vested Options Outstanding, Beginning balance 246,337 54,187
Shares, Granted 600,397 276,025
Shares, Vested (220,710) (83,875)
Shares, Expired (154,844)  
Number of Non-vested Options Outstanding, Ending balance 471,180 246,337
Weighted average grant date fair value $ 0.76 $ 1.42