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v3.8.0.1

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2014 | $ 9,773 | $ 1 | $ 98,133 | $ 469 | $ (88,830)
Beginning balance (in shares) at Dec. 31, 2014 |  | 9,424 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock, including under registered follow-on offering, net | 23,574 |  | 23,574 |  |
Issuance of common stock, including under registered follow-on offering, net (in shares) |  | 1,500 |  |  |
Issuance of common stock under employee stock option and stock purchase plans | 346 |  | 346 |  |
Issuance of common stock under employee stock option and stock purchase plans (in shares) |  | 77 |  |  |
Stock-based compensation | 813 |  | 813 |  |
Stock-based compensation (shares) |  | 10 |  |  |
Warrants exercised | 2,503 |  | 2,503 |  |
Warrants exercised (in shares) |  | 638 |  |  |
Foreign currency translation adjustment | (469) |  |  | (469) |
Net (loss) income | 8,780 |  |  |  | 8,780
Ending balance at Dec. 31, 2015 | 45,320 | $ 1 | 125,369 | 0 | (80,050)
Ending balance (in shares) at Dec. 31, 2015 |  | 11,649 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock under employee stock option and stock purchase plans | 455 |  | 455 |  |
Issuance of common stock under employee stock option and stock purchase plans (in shares) |  | 113 |  |  |
Common stock withheld in lieu of income tax withholding from share-based compensation | (309) |  | (309) |  |
Common stock withheld in lieu of income tax withholding from share-based compensation (in shares) |  | (51) |  |  |
Stock-based compensation | 1,360 |  | 1,360 |  |
Foreign currency translation adjustment | (1) |  |  | (1) |
Net (loss) income | (16,887) |  |  |  | (16,887)
Ending balance at Dec. 31, 2016 | 29,938 | $ 1 | 126,875 | (1) | (96,937)
Ending balance (in shares) at Dec. 31, 2016 |  | 11,711 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock under employee stock option and stock purchase plans | 130 |  | 130 |  |
Issuance of common stock under employee stock option and stock purchase plans (in shares) |  | 173 |  |  |
Common stock withheld in lieu of income tax withholding from share-based compensation | (49) |  | (49) |  |
Common stock withheld in lieu of income tax withholding from share-based compensation (in shares) |  | (15) |  |  |
Stock-based compensation | 807 |  | 807 |  |
Stock-based compensation reversal | (270) |  | (270) |  |
Foreign currency translation adjustment | 3 |  |  | 3 |
Net (loss) income | (11,267) |  |  |  | (11,267)
Ending balance at Dec. 31, 2017 | $ 19,292 | $ 1 | $ 127,493 | $ 2 | $ (108,204)
Ending balance (in shares) at Dec. 31, 2017 |  | 11,869 |  |  |

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