Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands |
Total |
Preferred Stock |
Common Stock |
Additional Paid-in Capital |
Accumulated Deficit |
Common Class |
Common Class
Common Stock
|
Common Class
Additional Paid-in Capital
|
Series C Preferred Stock |
Series C Preferred Stock
Preferred Stock
|
Series C Preferred Stock
Additional Paid-in Capital
|
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning balance at Dec. 31, 2017 | $ 223,887 | $ 0 | $ 2,043 | $ 549,958 | $ (328,114) | |||||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||||||||
| Issuance of stock | $ 129,710 | $ 135 | $ 129,575 | $ 35,066 | $ 43 | $ 35,023 | ||||||||||
| Share-based compensation | [1] | 17,429 | 15 | 17,414 | ||||||||||||
| Share-based payments | 0 | |||||||||||||||
| Net loss | (61,038) | (61,038) | ||||||||||||||
| Ending balance at Jun. 30, 2018 | 345,054 | 43 | 2,193 | 731,970 | (389,152) | |||||||||||
| Beginning balance at Mar. 31, 2018 | 252,222 | 28 | 2,072 | 603,420 | (353,298) | |||||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||||||||
| Issuance of stock | $ 115,236 | $ 120 | $ 115,116 | $ 12,456 | $ 15 | $ 12,441 | ||||||||||
| Share-based compensation | 994 | 1 | 993 | |||||||||||||
| Net loss | (35,854) | (35,854) | ||||||||||||||
| Ending balance at Jun. 30, 2018 | 345,054 | 43 | 2,193 | 731,970 | (389,152) | |||||||||||
| Beginning balance at Dec. 31, 2018 | 297,934 | 61 | 2,195 | 749,537 | (453,859) | |||||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||||||||
| Share-based compensation | [2] | 14,496 | 15 | 14,481 | ||||||||||||
| Share-based payments | 545 | 545 | ||||||||||||||
| Issuance of common stock purchase warrant | 3,300 | 3,300 | ||||||||||||||
| Net loss | (74,619) | (74,619) | ||||||||||||||
| Ending balance at Jun. 30, 2019 | 241,656 | 61 | 2,210 | 767,863 | (528,478) | |||||||||||
| Beginning balance at Mar. 31, 2019 | 277,611 | 61 | 2,209 | 763,326 | (487,985) | |||||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||||||||
| Share-based compensation | 742 | 1 | 741 | |||||||||||||
| Share-based payments | 496 | 496 | ||||||||||||||
| Issuance of common stock purchase warrant | 3,300 | 3,300 | ||||||||||||||
| Net loss | (40,493) | (40,493) | ||||||||||||||
| Ending balance at Jun. 30, 2019 | $ 241,656 | $ 61 | $ 2,210 | $ 767,863 | $ (528,478) | |||||||||||
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