Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Schedule of Options Granted (Details)

v3.19.3
Stock-Based Compensation - Schedule of Options Granted (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Share-based Payment Arrangement [Abstract]        
Options granted 105,600 157,000 1,490,490 1,026,800
Weighted-average Exercise price $ 2.58 $ 14.45 $ 6.53 $ 14.38
Weighted-average Grant date fair value $ 2.09 $ 11.44 $ 5.14 $ 11.36