Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Earnings (Loss) Per Share (Details)

v3.19.1
Basis of Presentation and Summary of Significant Accounting Policies - Earnings (Loss) Per Share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Summary of computation of basic and diluted net income (loss) per share    
Weighted average shares outstanding (shares) 20,447 21,209
Dilutive potential common shares:    
Restricted stock (shares) 45 64
Stock options (shares) 785 1,119
2019 convertible senior notes (shares) 0 1,719
Warrants (shares) 0 689
Shares used to compute diluted income per share (shares) 21,277 24,800
Potentially dilutive shares excluded from calculation due to anti-dilutive effect (shares) 7,015 148