Annual report pursuant to Section 13 and 15(d)

Net Income (Loss) Per Share Antidilutive Securities (Details)

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Net Income (Loss) Per Share Antidilutive Securities (Details) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 8,244,079 8,263,826 6,764,525
Stock options      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 1,150,586 0 2,254,565
Unvested restricted stock units and awards      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 1,572,988 0 1,766,639
Convertible Notes (1)      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 5,050,505 7,793,826 2,743,321
Warrants      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 470,000 470,000 0