Quarterly report pursuant to Section 13 or 15(d)

Capital Stock - Textual (Details)

v3.19.3
Capital Stock - Textual (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Jun. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Equity [Abstract]      
Stock options exercised (shares)   970,256 729,596
Weighted average exercise price of stock options exercised (usd per share)   $ 4.76 $ 5.92
Proceeds from exercises of stock options   $ 4,621 $ 4,319
Private Placement Common Stock      
Issuance costs   0 180
Proceeds from issuance of common stock in connection with private placement   $ 50,000 $ 0
Private Placement [Member]      
Private Placement Common Stock      
Shares issued (in shares) 3,048,780    
Price per share (in dollars per share) $ 16.40    
Issuance costs $ 100    
Proceeds from issuance of common stock in connection with private placement $ 49,900