Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Apr. 30, 2016 |
Jan. 31, 2016 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Allowance for Doubtful Accounts | $ 1,800 | $ 1,200 |
| Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Preferred stock, authorized (in shares) | 2,207,000 | 2,207,000 |
| Preferred stock, issued (in shares) | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Common stock, authorized (in shares) | 120,000,000 | 120,000,000 |
| Common stock, issued (in shares) | 63,046,000 | 62,614,000 |
| Common stock, outstanding (in shares) | 62,198,000 | 62,266,000 |
| Treasury stock, (in shares) | 848,000 | 348,000 |