Net Loss Per Share (Schedule of Basic and Diluted Loss Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Numerator | ||||
| Net loss from continuing operations | $ (7,125) | $ (6,793) | $ (21,742) | $ (19,666) |
| Net income from discontinued operations | 0 | 219 | 0 | 219 |
| Net loss | $ (7,125) | $ (6,574) | $ (21,742) | $ (19,447) |
| Denominator | ||||
| Weighted average common shares outstanding used to compute net loss per share, basic and diluted (in shares) | 22,096,610 | 20,183,939 | 21,532,953 | 19,902,815 |
| Net loss per share of common stock, basic and diluted | ||||
| Net loss per share from continuing operations (in usd per share) | $ (0.32) | $ (0.34) | $ (1.01) | $ (0.99) |
| Net income per share from discontinued operations (in usd per share) | 0.00 | 0.01 | 0.00 | 0.01 |
| Net loss per share, basic and diluted (in usd per share) | $ (0.32) | $ (0.33) | $ (1.01) | $ (0.98) |