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v3.10.0.1

Statement of Stockholders' Equity - USD ($) $ in Thousands | Scenario, Previously Reported Common Stock | Scenario, Previously Reported Additional Paid-in Capital | Scenario, Previously Reported Accumulated Other Comprehensive Loss | Scenario, Previously Reported Accumulated Deficit | Scenario, Previously Reported | Restatement Adjustment Additional Paid-in Capital | Restatement Adjustment Accumulated Deficit | Restatement Adjustment | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Accumulated Deficit | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Adoption of new accounting principle | ASU 2014-09 |  |  |  |  |  |  | $ 2,479 | $ 2,479 |  |  |  |  |
Balance, revised |  |  |  |  |  |  |  |  | $ 405 | $ 424,128 | $ (516) | $ (259,106) | $ 164,911
Balance at Dec. 31, 2015 | $ 405 | $ 424,128 | $ (516) | $ (261,585) | $ 162,432 |  |  |  |  |  |  |  |
Balance (in shares) at Dec. 31, 2015 | 40,551,039 |  |  |  |  |  |  |  | 40,551,039 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock, net of issuance cost |  |  |  |  |  |  |  |  | $ 53 | 119,216 |  |  | 119,269
Sale of common stock, net of issuance cost (in shares) |  |  |  |  |  |  |  |  | 5,272,750 |  |  |  |
Issuance of common stock upon exercise of stock awards |  |  |  |  |  |  |  |  | $ 7 | 1,153 |  |  | 1,160
Issuance of common stock upon exercise of stock awards (in shares) |  |  |  |  |  |  |  |  | 699,066 |  |  |  |
Issuance of common stock under the Employee Stock Purchase Plan |  |  |  |  |  |  |  |  | $ 1 | 544 |  |  | 545
Issuance of common stock under the Employee Stock Purchase Plan (in shares) |  |  |  |  |  |  |  |  | 45,123 |  |  |  |
Comprehensive loss |  |  |  |  |  |  |  |  |  |  | (925) | 45,125 | 44,200
Stock-based compensation expense |  |  |  |  |  |  |  |  |  | 7,848 |  |  | 7,848
Balance at Dec. 31, 2016 | $ 466 | $ 552,889 | $ (1,441) | $ (213,981) | $ 337,933 |  |  |  | $ 466 | 552,889 | (1,441) | (213,981) | 337,933
Balance (in shares) at Dec. 31, 2016 | 46,567,978 |  |  |  |  |  |  |  | 46,567,978 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Adoption of new accounting principle | ASU 2016-09 |  |  |  |  |  | $ 401 | $ (401) |  |  |  |  |  |
Balance, revised |  |  |  |  |  |  |  |  | $ 466 | 553,290 | (1,441) | (214,382) | 337,933
Issuance of common stock upon exercise of stock awards |  |  |  |  |  |  |  |  | $ 4 | 2,793 |  |  | 2,797
Issuance of common stock upon exercise of stock awards (in shares) |  |  |  |  |  |  |  |  | 363,603 |  |  |  |
Issuance of common stock under the Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  | 936 |  |  | 936
Issuance of common stock under the Employee Stock Purchase Plan (in shares) |  |  |  |  |  |  |  |  | 70,907 |  |  |  |
Comprehensive loss |  |  |  |  |  |  |  |  |  |  | (367) | (38,486) | (38,853)
Stock-based compensation expense |  |  |  |  |  |  |  |  |  | 13,651 |  |  | 13,651
Balance at Dec. 31, 2017 |  |  |  |  |  |  |  |  | $ 470 | 570,670 | (1,808) | (252,868) | 316,464
Balance (in shares) at Dec. 31, 2017 |  |  |  |  |  |  |  |  | 47,002,488 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, revised |  |  |  |  |  |  |  |  | $ 470 | 570,670 | (1,808) | (252,868) | 316,464
Sale of common stock, net of issuance cost |  |  |  |  |  |  |  |  | $ 84 | 245,420 |  |  | 245,504
Sale of common stock, net of issuance cost (in shares) |  |  |  |  |  |  |  |  | 8,395,000 |  |  |  |
Issuance of common stock upon exercise of stock awards |  |  |  |  |  |  |  |  | $ 8 | 7,609 |  |  | 7,617
Issuance of common stock upon exercise of stock awards (in shares) |  |  |  |  |  |  |  |  | 824,731 |  |  |  |
Issuance of common stock under the Employee Stock Purchase Plan |  |  |  |  |  |  |  |  | $ 1 | 1,119 |  |  | 1,120
Issuance of common stock under the Employee Stock Purchase Plan (in shares) |  |  |  |  |  |  |  |  | 57,323 |  |  |  |
Comprehensive loss |  |  |  |  |  |  |  |  |  |  | 837 | (70,409) | (69,572)
Stock-based compensation expense |  |  |  |  |  |  |  |  |  | 20,548 |  |  | 20,548
Balance at Dec. 31, 2018 |  |  |  |  |  |  |  |  | $ 563 | $ 845,366 | $ (971) | $ (323,277) | $ 521,681
Balance (in shares) at Dec. 31, 2018 |  |  |  |  |  |  |  |  | 56,279,542 |  |  |  |

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