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v3.19.2

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive (Loss) Income | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Beginning Balances at Dec. 31, 2017 | $ 199,549 | $ 62 | $ 1,107,693 | $ (881) | $ (907,325)
Beginning Balances (in shares) at Dec. 31, 2017 |  | 61,533 |  |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net | (549) | $ 1 | (550) |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net (in shares) |  | 1,017 |  |  |
Issuance of common stock under Employee Stock Purchase Plan | 255 |  | 255 |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 58 |  |  |
Stock compensation expense | 11,089 |  | 11,089 |  |
Total other comprehensive income (loss) | (629) |  |  | (629) |
Net loss | (78,402) |  |  |  | (78,402)
Ending Balances at Jun. 30, 2018 | 131,313 | $ 63 | 1,118,487 | (1,510) | (985,727)
Ending Balances (in shares) at Jun. 30, 2018 |  | 62,608 |  |  |
Beginning Balances at Mar. 31, 2018 | 165,887 | $ 62 | 1,112,321 | (213) | (946,283)
Beginning Balances (in shares) at Mar. 31, 2018 |  | 62,254 |  |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net | (123) | $ 1 | (124) |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net (in shares) |  | 354 |  |  |
Stock compensation expense | 6,290 |  | 6,290 |  |
Total other comprehensive income (loss) | (1,297) |  |  | (1,297) |
Net loss | (39,444) |  |  |  | (39,444)
Ending Balances at Jun. 30, 2018 | 131,313 | $ 63 | 1,118,487 | (1,510) | (985,727)
Ending Balances (in shares) at Jun. 30, 2018 |  | 62,608 |  |  |
Beginning Balances at Dec. 31, 2018 | 63,065 | $ 63 | 1,131,241 | (2,015) | (1,066,224)
Beginning Balances (in shares) at Dec. 31, 2018 |  | 62,862 |  |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net | 1 |  | 1 |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net (in shares) |  | 831 |  |  |
Issuance of common stock under Employee Stock Purchase Plan | 407 |  | 407 |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 75 |  |  |
Issuance of common stock, net of issuance costs | 13,949 | $ 2 | 13,947 |  |
Issuance of common stock, net of issuance costs (in shares) |  | 1,387 |  |  |
Stock compensation expense | 15,519 |  | 15,519 |  |
Total other comprehensive income (loss) | 32 |  |  | 32 |
Net loss | (82,385) |  |  |  | (82,385)
Ending Balances at Jun. 30, 2019 | 10,588 | $ 65 | 1,161,115 | (1,983) | (1,148,609)
Ending Balances (in shares) at Jun. 30, 2019 |  | 65,155 |  |  |
Beginning Balances at Mar. 31, 2019 | 43,159 | $ 65 | 1,151,421 | (2,431) | (1,105,896)
Beginning Balances (in shares) at Mar. 31, 2019 |  | 65,020 |  |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net | 19 |  | 19 |  |
Issuance (withholding) of common stock upon exercise of stock options and restricted stock awards, net (in shares) |  | 91 |  |  |
Issuance of common stock, net of issuance costs | 326 |  | 326 |  |
Issuance of common stock, net of issuance costs (in shares) |  | 44 |  |  |
Stock compensation expense | 9,349 |  | 9,349 |  |
Total other comprehensive income (loss) | 448 |  |  | 448 |
Net loss | (42,713) |  |  |  | (42,713)
Ending Balances at Jun. 30, 2019 | $ 10,588 | $ 65 | $ 1,161,115 | $ (1,983) | $ (1,148,609)
Ending Balances (in shares) at Jun. 30, 2019 |  | 65,155 |  |  |

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