Condensed Consolidated Statements of Stockholders' Deficit - USD ($) shares in Thousands, $ in Thousands | Total | 2025 Notes | 2022 Notes | Common shares | Series E preferred stock | Preferred Stock | Preferred Stock Series E preferred stock | Common Stock | Common Stock 2025 Notes | Common Stock Common shares | Common Stock Series E preferred stock | Additional Paid-in Capital | Additional Paid-in Capital 2025 Notes | Additional Paid-in Capital 2022 Notes | Additional Paid-in Capital Common shares | Additional Paid-in Capital Series E preferred stock | Accumulated Deficit | Accumulated Deficit Series E preferred stock | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interests |
Beginning balance (shares) at Dec. 31, 2020 | | | | | | 35 | | 99,399 | | | | | | | | | | | | |
Beginning balance at Dec. 31, 2020 | $ (27,899) | | | | | $ 0 | | $ 99 | | | | $ 711,487 | | | | | $ (732,422) | | $ (6,972) | $ (91) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | |
Net 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 (shares) | | | | | | | | 2,081 | | | | | | | | | | | | |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 3,537 | | | | | | | $ 2 | | | | 3,535 | | | | | | | | |
Taxes withheld on net settled vesting of restricted stock units | (1,105) | | | | | | | | | | | (1,105) | | | | | | | | |
Issuance of common shares in connection with conversion of notes (shares) | | | | | | | | | 429 | | | | | | | | | | | |
Issuance of common shares in connection with conversion of notes | | $ 5,382 | | | | | | | | | | | $ 5,382 | | | | | | | |
Issuance of common shares in connection with a public offering, net of issuance costs (shares) | | | | | | | | | | 1,516 | | | | | | | | | | |
Issuance of common shares in connection with a public offering, net of issuance costs | | | | $ 29,370 | | | | | | $ 2 | | | | | $ 29,368 | | | | | |
Share-based compensation | 14,467 | | | | | | | | | | | 14,467 | | | | | | | | |
Series E preferred stock dividends | | | | | $ 0 | | | | | | | | | | | $ 2,492 | | $ (2,492) | | |
Preferred Stock Exchange, Shares | | | | | | | (10) | | | | 1,525 | | | | | | | | | |
Preferred Stock Exchange | | | | | 0 | | | | | | $ 2 | | | | | 1,102 | | (1,104) | | |
Release of cumulative foreign currency translation adjustments as a result of sale of Ctrack South Africa | (140) | | | | | | | | | | | 8 | | | | | (1,748) | | 1,608 | (8) |
Net noncontrolling interest acquired | 125 | | | | | | | | | | | | | | | | 240 | | | (115) |
Ending balance (shares) at Sep. 30, 2021 | | | | | | 25 | | 104,950 | | | | | | | | | | | | |
Ending balance at Sep. 30, 2021 | (15,332) | | | | | $ 0 | | $ 105 | | | | 766,736 | | | | | (774,931) | | (7,242) | 0 |
Beginning balance (shares) at Jun. 30, 2021 | | | | | | 35 | | 103,109 | | | | | | | | | | | | |
Beginning balance at Jun. 30, 2021 | (8,906) | | | | | $ 0 | | $ 103 | | | | 761,412 | | | | | (764,150) | | (6,279) | 8 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | |
Net loss | (7,190) | | | | | | | | | | | | | | | | (7,190) | | | |
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 (shares) | | | | | | | | 316 | | | | | | | | | | | | |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 693 | | | | | | | | | | | 693 | | | | | | | | |
Taxes withheld on net settled vesting of restricted stock units | (280) | | | | | | | | | | | (280) | | | | | | | | |
Share-based compensation | 3,062 | | | | | | | | | | | 3,062 | | | | | | | | |
Series E preferred stock dividends | 0 | | | | | | | | | | | 739 | | | | | (739) | | | |
Preferred Stock Exchange, Shares | | | | | | | (10) | | | | 1,525 | | | | | | | | | |
Preferred Stock Exchange | | | | | 0 | | | | | | $ 2 | | | | | 1,102 | | (1,104) | | |
Release of cumulative foreign currency translation adjustments as a result of sale of Ctrack South Africa | (140) | | | | | | | | | | | 8 | | | | | (1,748) | | 1,608 | (8) |
Ending balance (shares) at Sep. 30, 2021 | | | | | | 25 | | 104,950 | | | | | | | | | | | | |
Ending balance at Sep. 30, 2021 | (15,332) | | | | | $ 0 | | $ 105 | | | | 766,736 | | | | | (774,931) | | (7,242) | 0 |
Beginning balance (shares) at Dec. 31, 2021 | | | | | | 25 | | 105,381 | | | | | | | | | | | | |
Beginning balance at Dec. 31, 2021 | (24,854) | | | | | $ 0 | | $ 105 | | | | 770,619 | | | | | (787,047) | | (8,531) | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | |
Net loss | (53,342) | | | | | | | | | | | | | | | | | | | |
Foreign currency translation adjustment | 4,581 | | | | | | | | | | | | | | | | | | 4,581 | |
Adjustment relating to extinguishment of 2022 Notes | | | $ 1,727 | | | | | | | | | | | $ 1,727 | | | | | | |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares) | | | | | | | | 2,470 | | | | | | | | | | | | |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 253 | | | | | | | $ 3 | | | | 250 | | | | | | | | |
Taxes withheld on net settled vesting of restricted stock units | (57) | | | | | | | | | | | (57) | | | | | | | | |
Taxes withheld on net settled vesting of restricted stock units (in shares) | | | | | | | | (5) | | | | | | | | | | | | |
Share-based compensation | 15,892 | | | | | | | | | | | 15,892 | | | | | | | | |
Series E preferred stock dividends | | | | | 0 | | | | | | | | | | | 2,029 | | (2,029) | | |
Ending balance (shares) at Sep. 30, 2022 | | | | | | 25 | | 107,846 | | | | | | | | | | | | |
Ending balance at Sep. 30, 2022 | (55,800) | | | | | $ 0 | | $ 108 | | | | 790,460 | | | | | (842,418) | | (3,950) | 0 |
Beginning balance (shares) at Jun. 30, 2022 | | | | | | 25 | | 107,645 | | | | | | | | | | | | |
Beginning balance at Jun. 30, 2022 | (43,690) | | | | | $ 0 | | $ 108 | | | | 787,283 | | | | | (825,984) | | (5,097) | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | |
Net loss | (15,743) | | | | | | | | | | | | | | | | (15,743) | | | |
Foreign currency translation adjustment | 1,147 | | | | | | | | | | | | | | | | | | 1,147 | |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares) | | | | | | | | 201 | | | | | | | | | | | | |
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan | 101 | | | | | | | | | | | 101 | | | | | | | | |
Taxes withheld on net settled vesting of restricted stock units | (21) | | | | | | | | | | | (21) | | | | | | | | |
Share-based compensation | 2,406 | | | | | | | | | | | 2,406 | | | | | | | | |
Series E preferred stock dividends | | | | | $ 0 | | | | | | | | | | | $ 691 | | $ (691) | | |
Ending balance (shares) at Sep. 30, 2022 | | | | | | 25 | | 107,846 | | | | | | | | | | | | |
Ending balance at Sep. 30, 2022 | $ (55,800) | | | | | $ 0 | | $ 108 | | | | $ 790,460 | | | | | $ (842,418) | | $ (3,950) | $ 0 |