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Consolidated Statements of Stockholders' Deficit - USD ($) shares in Thousands, $ in Thousands | Total | 2022 Notes | 2025 Notes | Series E preferred shares | Common stock | Preferred Stock | Preferred Stock Series E preferred shares | Common Stock | Common Stock 2022 Notes | Common Stock 2025 Notes | Common Stock Common stock | Additional Paid-in Capital | Additional Paid-in Capital 2022 Notes | Additional Paid-in Capital 2025 Notes | Additional Paid-in Capital Series E preferred shares | Additional Paid-in Capital Common stock | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2018 | $ (36,525) |  |  |  |  | $ 0 |  | $ 74 |  |  |  | $ 546,230 |  |  |  |  | $ (577,817) | $ (4,877) | $ (135)
Beginning balance, shares (in shares) at Dec. 31, 2018 |  |  |  |  |  | 0 |  | 73,980 |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | (40,110) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (40,125) |  | 15
Foreign currency translation adjustment | 998 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 998 |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 3,265 |  |  |  |  |  |  | $ 2 |  |  |  | 3,263 |  |  |  |  |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (in shares) |  |  |  |  |  |  |  | 2,254 |  |  |  |  |  |  |  |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (1,269) |  |  |  |  |  |  |  |  |  |  | (1,269) |  |  |  |  |  |  |
Issuance of shares |  |  |  | $ 10,000 | $ 1,439 |  |  |  |  |  | $ 0 |  |  |  | $ 10,000 | $ 1,439 |  |  |
Issuance of shares (in shares) |  |  |  |  |  |  | 10 |  |  |  | 263 |  |  |  |  |  |  |  |
Exercise of warrants | 17,542 |  |  |  |  |  |  | $ 6 |  |  |  | 17,536 |  |  |  |  |  |  |
Exercise of warrants (in shares) |  |  |  |  |  |  |  | 5,477 |  |  |  |  |  |  |  |  |  |  |
Share-based compensation | 7,302 |  |  |  |  |  |  |  |  |  |  | 7,302 |  |  |  |  |  |  |
Series E preferred stock dividends | 0 |  |  |  |  |  |  |  |  |  |  | 361 |  |  |  |  | (361) |  |
Ending balance at Dec. 31, 2019 | (37,358) |  |  |  |  | $ 0 |  | $ 82 |  |  |  | 584,862 |  |  |  |  | (618,303) | (3,879) | (120)
Ending balance, shares (in shares) at Dec. 31, 2019 |  |  |  |  |  | 10 |  | 81,974 |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | (111,186) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (111,215) |  | 29
Foreign currency translation adjustment | (3,093) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,093) |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 5,422 |  |  |  |  |  |  | $ 2 |  |  |  | 5,420 |  |  |  |  |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (in shares) |  |  |  |  |  |  |  | 2,081 |  |  |  |  |  |  |  |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (354) |  |  |  |  |  |  |  |  |  |  | (354) |  |  |  |  |  |  |
Issuance of shares |  |  |  | 25,000 |  |  |  |  |  |  |  |  |  |  | 25,000 |  |  |  |
Issuance of shares (in shares) |  |  |  |  |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |
Issuance of Series E preferred stock in lieu of interest |  |  |  | $ 2,330 |  |  |  |  |  |  |  |  |  |  | $ 2,330 |  |  |  |
Issuance of Series E preferred stock in lieu of interest (in shares) |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of Series E preferred stock | (2,354) |  |  |  |  |  |  |  |  |  |  | (2,354) |  |  |  |  |  |  |
Repurchase of Series E preferred stock (in shares) |  |  |  |  |  | (2) |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common shares under settlement |  | $ 66,088 | $ 14,354 |  |  |  |  |  | $ 14 | $ 1 |  |  | $ 66,074 | $ 14,353 |  |  |  |  |
Issuance of common shares under settlement (in shares) |  |  |  |  |  |  |  |  | 13,739 | 1,177 |  |  |  |  |  |  |  |  |
Exercise of warrants | 1,861 |  |  |  |  |  |  | $ 0 |  |  |  | 1,861 |  |  |  |  |  |  |
Exercise of warrants (in shares) |  |  |  |  |  |  |  | 338 |  |  |  |  |  |  |  |  |  |  |
Share-based compensation | 10,419 |  |  |  |  |  |  |  |  |  |  | 10,419 |  |  |  |  |  |  |
Series E preferred stock dividends | 0 |  |  |  |  |  |  |  |  |  |  | 2,904 |  |  |  |  | (2,904) |  |
Issuance of common shares under settlement agreement | 972 |  |  |  |  |  |  |  |  |  |  | 972 |  |  |  |  |  |  |
Issuance of common shares under settlement (in shares) |  |  |  |  |  |  |  | 90 |  |  |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2020 | $ (27,899) |  |  |  |  | $ 0 |  | $ 99 |  |  |  | $ 711,487 |  |  |  |  | $ (732,422) | $ (6,972) | $ (91)
Ending balance, shares (in shares) at Dec. 31, 2020 |  |  |  |  |  | 35 |  | 99,399 |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4590271-111686 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683 + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant