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v3.19.1

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2016 | $ (17,727) | $ 54 | $ 507,616 | $ (524,024) | $ (1,409) | $ 36
Beginning Balance, shares (in shares) at Dec. 31, 2016 |  | 54,372 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net loss | (45,840) |  |  | (45,735) |  | (105)
Foreign currency translation adjustment | 6,013 |  |  |  | 6,013 |
Noncontrolling interest acquired | 19 |  |  |  |  | 19
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 390 | $ 2 | 388 |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under ESPP (in shares) |  | 1,231 |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (896) |  | (896) |  |  |
Issuance of common stock | 5,078 | $ 3 | 5,075 |  |  |
Issuance of common stock (in shares) |  | 3,042 |  |  |  |
Share-based compensation | 3,748 |  | 3,748 |  |  |
Share-based compensation (in shares) |  | 0 |  |  |  |
Additional discount on exchange of convertible senior notes | 3,600 |  | 3,600 |  |  |
Ending Balance at Dec. 31, 2017 | (45,615) | $ 59 | 519,531 | (569,759) | 4,604 | (50)
Ending Balance, shares (in shares) at Dec. 31, 2017 |  | 58,645 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net loss | (8,143) |  |  | (8,058) |  | (85)
Foreign currency translation adjustment | (9,481) |  |  |  | (9,481) |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 2,408 | $ 3 | 2,405 |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under ESPP (in shares) |  | 2,645 |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (656) |  | (656) |  |  |
Issuance of common stock | 20,086 | $ 12 | 20,074 |  |  |
Issuance of common stock (in shares) |  | 12,690 |  |  |  |
Share-based compensation | 4,876 |  | 4,876 |  |  |
Share-based compensation (in shares) |  | 0 |  |  |  |
Ending Balance at Dec. 31, 2018 | $ (36,525) | $ 74 | $ 546,230 | $ (577,817) | $ (4,877) | $ (135)
Ending Balance, shares (in shares) at Dec. 31, 2018 |  | 73,980 |  |  |  |

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