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Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands | Total | 2022 Notes | 2025 Notes | Series E preferred stock | Common shares | Preferred Stock | Preferred Stock Series E preferred stock | Common Stock | Common Stock 2022 Notes | Common Stock 2025 Notes | Common Stock Common shares | Additional Paid-in Capital | Additional Paid-in Capital 2022 Notes | Additional Paid-in Capital 2025 Notes | Additional Paid-in Capital Series E preferred stock | Additional Paid-in Capital Common shares | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit | Noncontrolling Interests
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Beginning balance at Dec. 31, 2019 | $ (37,358) |  |  |  |  | $ 0 |  | $ 82 |  |  |  | $ 584,862 |  |  |  |  | $ (3,879) | $ (618,303) | $ (120)
Beginning Balance (shares) at Dec. 31, 2019 |  |  |  |  |  | 10 |  | 81,974 |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (98,441) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (98,470) | 29
Foreign currency translation adjustment | (10,734) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,734) |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 3,198 |  |  |  |  |  |  | $ 2 |  |  |  | 3,196 |  |  |  |  |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares) |  |  |  |  |  |  |  | 1,471 |  |  |  |  |  |  |  |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (326) |  |  |  |  |  |  |  |  |  |  | (326) |  |  |  |  |  |  |
Issuance of common shares under settlement agreement | 972 |  |  |  |  |  |  |  |  |  |  | 972 |  |  |  |  |  |  |
Issuance of common shares under settlement agreement (in shares) |  |  |  |  |  |  |  | 90 |  |  |  |  |  |  |  |  |  |  |
Issuance of common shares in connection with conversion or exchange of notes |  | $ 66,088 | $ 14,354 |  |  |  |  |  | $ 14 | $ 1 |  |  | $ 66,074 | $ 14,353 |  |  |  |  |
Issuance of common shares in connection with conversion or exchange of notes (shares) |  |  |  |  |  |  |  |  | 13,739 | 1,177 |  |  |  |  |  |  |  |  |
Issuance of shares |  |  |  | $ 25,000 |  |  |  |  |  |  |  |  |  |  | $ 25,000 |  |  |  |
Issuance of shares (shares) |  |  |  |  |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation | 8,188 |  |  |  |  |  |  |  |  |  |  | 8,188 |  |  |  |  |  |  |
Series E preferred stock dividends | 0 |  |  |  |  |  |  |  |  |  |  | 2,056 |  |  |  |  |  | (2,056) |
Issuance of Series E preferred stock in lieu of interest |  |  |  | 2,330 |  |  |  |  |  |  |  |  |  |  | 2,330 |  |  |  |
Issuance of Series E preferred stock in lieu of interest (shares) |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of Series E preferred stock |  |  |  | $ (2,354) |  |  |  |  |  |  |  |  |  |  | $ (2,354) |  |  |  |
Repurchase of Series E preferred stock (shares) |  |  |  |  |  |  | (2) |  |  |  |  |  |  |  |  |  |  |  |
Exercise of warrants | 1,861 |  |  |  |  |  |  |  |  |  |  | 1,861 |  |  |  |  |  |  |
Exercise of warrants (shares) |  |  |  |  |  |  |  | 338 |  |  |  |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2020 | (27,222) |  |  |  |  | $ 0 |  | $ 99 |  |  |  | 706,212 |  |  |  |  | (14,613) | (718,829) | (91)
Ending Balance (shares) at Sep. 30, 2020 |  |  |  |  |  | 35 |  | 98,789 |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Jun. 30, 2020 | (41,928) |  |  |  |  | $ 0 |  | $ 97 |  |  |  | 686,410 |  |  |  |  | (15,783) | (712,558) | (94)
Beginning Balance (shares) at Jun. 30, 2020 |  |  |  |  |  | 35 |  | 97,018 |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (5,439) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,442) | 3
Foreign currency translation adjustment | 1,170 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,170 |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 1,486 |  |  |  |  |  |  | $ 1 |  |  |  | 1,485 |  |  |  |  |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares) |  |  |  |  |  |  |  | 504 |  |  |  |  |  |  |  |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (45) |  |  |  |  |  |  |  |  |  |  | (45) |  |  |  |  |  |  |
Issuance of common shares under settlement agreement | 972 |  |  |  |  |  |  |  |  |  |  | 972 |  |  |  |  |  |  |
Issuance of common shares under settlement agreement (in shares) |  |  |  |  |  |  |  | 90 |  |  |  |  |  |  |  |  |  |  |
Issuance of common shares in connection with conversion or exchange of notes |  | 1 | $ 14,354 |  |  |  |  |  |  | $ 1 |  |  | 1 | $ 14,353 |  |  |  |  |
Issuance of common shares in connection with conversion or exchange of notes (shares) |  |  |  |  |  |  |  |  |  | 1,177 |  |  |  |  |  |  |  |  |
Share-based compensation | 2,207 |  |  |  |  |  |  |  |  |  |  | 2,207 |  |  |  |  |  |  |
Series E preferred stock dividends | 0 |  |  |  |  |  |  |  |  |  |  | 829 |  |  |  |  |  | (829) |
Ending balance at Sep. 30, 2020 | (27,222) |  |  |  |  | $ 0 |  | $ 99 |  |  |  | 706,212 |  |  |  |  | (14,613) | (718,829) | (91)
Ending Balance (shares) at Sep. 30, 2020 |  |  |  |  |  | 35 |  | 98,789 |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2020 | (27,899) |  |  |  |  | $ 0 |  | $ 99 |  |  |  | 711,487 |  |  |  |  | (6,972) | (732,422) | (91)
Beginning Balance (shares) at Dec. 31, 2020 |  |  |  |  |  | 35 |  | 99,399 |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (37,191) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (37,405) | 214
Foreign currency translation adjustment | (1,878) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,878) |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 3,537 |  |  |  |  |  |  | $ 2 |  |  |  | 3,535 |  |  |  |  |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares) |  |  |  |  |  |  |  | 2,081 |  |  |  |  |  |  |  |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (1,105) |  |  |  |  |  |  |  |  |  |  | (1,105) |  |  |  |  |  |  |
Issuance of common shares in connection with conversion or exchange of notes |  | $ 5,382 |  |  |  |  |  |  | $ 0 |  |  |  | $ 5,382 |  |  |  |  |  |
Issuance of common shares in connection with conversion or exchange of notes (shares) |  |  |  |  |  |  |  |  | 429 |  |  |  |  |  |  |  |  |  |
Issuance of shares |  |  |  |  | $ 29,370 |  |  |  |  |  | $ 2 |  |  |  |  | $ 29,368 |  |  |
Issuance of shares (shares) |  |  |  |  |  |  |  |  |  |  | 1,516 |  |  |  |  |  |  |  |
Release of cumulative foreign currency translation adjustments as a result of sale of Ctrack South Africa | (140) |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  | 1,608 | (1,748) | (8)
Share-based compensation | 14,467 |  |  |  |  |  |  |  |  |  |  | 14,467 |  |  |  |  |  |  |
Series E preferred stock dividends | 0 |  |  |  |  |  |  |  |  |  |  | 2,492 |  |  |  |  |  | (2,492) |
Series E preferred stock exchange | 0 |  |  |  |  |  |  | $ 2 |  |  |  | 1,102 |  |  |  |  |  | (1,104) |
Preferred stock exchange (shares) |  |  |  |  |  | (10) |  | 1,525 |  |  |  |  |  |  |  |  |  |  |
Net noncontrolling interest deconsolidated | 125 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 240 | (115)
Ending balance at Sep. 30, 2021 | (15,332) |  |  |  |  | $ 0 |  | $ 105 |  |  |  | 766,736 |  |  |  |  | (7,242) | (774,931) | 0
Ending Balance (shares) at Sep. 30, 2021 |  |  |  |  |  | 25 |  | 104,950 |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Jun. 30, 2021 | (8,906) |  |  |  |  | $ 0 |  | $ 103 |  |  |  | 761,412 |  |  |  |  | (6,279) | (764,150) | 8
Beginning Balance (shares) at Jun. 30, 2021 |  |  |  |  |  | 35 |  | 103,109 |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (7,190) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,190) | 0
Foreign currency translation adjustment | (2,571) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,571) |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 693 |  |  |  |  |  |  | $ 0 |  |  |  | 693 |  |  |  |  |  |  |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares) |  |  |  |  |  |  |  | 316 |  |  |  |  |  |  |  |  |  |  |
Taxes withheld on net settled vesting of restricted stock units | (280) |  |  |  |  |  |  |  |  |  |  | (280) |  |  |  |  |  |  |
Release of cumulative foreign currency translation adjustments as a result of sale of Ctrack South Africa | (140) |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  | 1,608 | (1,748) | (8)
Share-based compensation | 3,062 |  |  |  |  |  |  |  |  |  |  | 3,062 |  |  |  |  |  |  |
Series E preferred stock dividends | 0 |  |  |  |  |  |  |  |  |  |  | 739 |  |  |  |  |  | (739) |
Series E preferred stock exchange | 0 |  |  |  |  |  |  | $ 2 |  |  |  | 1,102 |  |  |  |  |  | (1,104) |
Preferred stock exchange (shares) |  |  |  |  |  | (10) |  | 1,525 |  |  |  |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2021 | $ (15,332) |  |  |  |  | $ 0 |  | $ 105 |  |  |  | $ 766,736 |  |  |  |  | $ (7,242) | $ (774,931) | $ 0
Ending Balance (shares) at Sep. 30, 2021 |  |  |  |  |  | 25 |  | 104,950 |  |  |  |  |  |  |  |  |  |  |

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