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v3.19.1

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Deficit [Member] | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 116 | $ 965,752 | $ (32) | $ (879,733) | $ 86,103
Balance, shares at Dec. 31, 2017 | 116,277 |  |  |  |
Net loss |  |  |  | (24,179) | (24,179)
Other comprehensive loss |  |  | (6) |  | (6)
ASC606 adoption effect |  |  |  | 189 | 189
Issuance of common stock in conjunction with equity plans | $ 2 | 2,485 |  |  | 2,487
Issuance of common stock in conjunction with equity plans, shares | 1,220 |  |  |  |
Issuance of common stock from ATM equity offering, net of issuance costs | $ 14 | 32,848 |  |  | 32,862
Issuance of common stock from ATM equity offering, net of issuance costs, shares | 14,375 |  |  |  |
Stock-based compensation expense |  | 5,282 |  |  | 5,282
Balance at Mar. 31, 2018 | $ 132 | 1,006,367 | (38) | (903,723) | 102,738
Balance, shares at Mar. 31, 2018 | 131,872 |  |  |  |
Balance at Dec. 31, 2017 | $ 116 | 965,752 | (32) | (879,733) | 86,103
Balance, shares at Dec. 31, 2017 | 116,277 |  |  |  |
Balance at Dec. 31, 2018 | $ 150 | 1,096,053 | (36) | (982,106) | $ 114,061
Balance, shares at Dec. 31, 2018 | 150,244 |  |  |  | 150,244
Net loss |  |  |  | (30,324) | $ (30,324)
Other comprehensive loss |  |  | 42 |  | 42
Issuance of common stock in conjunction with equity plans | $ 3 | 6,687 |  |  | 6,690
Issuance of common stock in conjunction with equity plans, shares | 2,428 |  |  |  |
Stock-based compensation expense |  | 4,381 |  |  | 4,381
Balance at Mar. 31, 2019 | $ 153 | $ 1,107,121 | $ 6 | $ (1,012,430) | $ 94,850
Balance, shares at Mar. 31, 2019 | 152,672 |  |  |  | 152,672

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