Description of Business and Summary of Significant Accounting Policies (EPS) (Details) - USD ($) shares in Thousands, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Numerator: | |||
| Net income (loss) | $ 15,979 | $ 12,954 | $ (1,652) |
| Denominator: | |||
| Weighted average common stock outstanding for basic net income per common share (in shares) | 24,803 | 23,402 | 24,121 |
| Effect of dilutive securities—stock options and restricted stock units (in shares) | 1,972 | 958 | |
| Weighted average common shares and dilutive securities outstanding (in shares) | 26,775 | 24,360 | 24,121 |