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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure [Abstract] |
Summary of Loss before Income Taxes | The Company’s loss before income taxes for the years ended December 31, 2022, 2021 and 2020 is comprised of the following (in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020 |  |
Domestic | $ | (63,939) |  |  | $ | (40,897) |  |  | $ | (109,837) |  |  |
Foreign | (4,495) |  |  | (6,823) |  |  | (601) |  |  |
Loss before income taxes | $ | (68,434) |  |  | $ | (47,720) |  |  | $ | (110,438) |  |  |
Summary of Provision for Income Taxes | The (benefit) provision for income taxes for the years ended December 31, 2022, 2021 and 2020 is comprised of the following (in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020 |  |
Current: |  |  |  |  |  |  |
Federal | $ | — |  |  | $ | — |  |  | $ | — |  |  |
State | 50 |  |  | 30 |  |  | (4) |  |  |
Foreign | 55 |  |  | 214 |  |  | 93 |  |  |
Total current | 105 |  |  | 244 |  |  | 89 |  |  |
Deferred: |  |  |  |  |  |  |
Federal | 15 |  |  | 12 |  |  | 12 |  |  |
State | — |  |  | — |  |  | — |  |  |
Foreign | (585) |  |  | (65) |  |  | 647 |  |  |
Total deferred | (570) |  |  | (53) |  |  | 659 |  |  |
(Benefit) Provision for income taxes | $ | (465) |  |  | $ | 191 |  |  | $ | 748 |  |  |
Summary of Net Deferred Tax Assets | The Company’s net deferred tax liabilities consist of the following (in thousands):
| December 31,
| 2022 |  | 2021
Deferred tax assets: |  |  |
Accrued expenses | $ | 715 |  |  | $ | 1,016 |
Provision for excess and obsolete inventory | 759 |  |  | 466 |
Capitalized research and experimental expenditures | 8,986 |  |  | — |
Convertible debt | 9,782 |  |  | 9,804 |
Interest expense limitation | 12,722 |  |  | 11,113 |
Net operating loss and tax credit carryforwards | 112,297 |  |  | 110,463 |
Share-based compensation | 3,375 |  |  | 2,562 |
Right-of-use-asset | 2,294 |  |  | 1,765 |
Unrecognized tax benefits | 1,942 |  |  | 1,567 |
Deferred tax assets | 152,872 |  |  | 138,756 |
Valuation allowances | (145,431) |  |  | (132,132) |
Deferred tax assets, net of valuation allowances | 7,441 |  |  | 6,624 |
Deferred tax liabilities: |  |  |
Operating lease liability | (2,518) |  |  | (1,830) |
Acquired intangible assets | (599) |  |  | (666) |
Depreciation and amortization | (4,288) |  |  | (4,376) |
Unrealized foreign currency gains | (359) |  |  | (604) |
Deferred tax liabilities | (7,764) |  |  | (7,476) |
Deferred tax liabilities, net | $ | (323) |  |  | $ | (852) |
Summary of Provision for Income Taxes Reconciles to Amount Computed by Applying Statutory Federal Income Tax Rate | The (benefit) provision for income taxes reconciles to the amount computed by applying the statutory federal income tax rate of 21% in 2022, 2021 and 2020 to loss before income taxes as follows (in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020 |  |
Federal tax benefit, at statutory rate | $ | (14,371) |  |  | $ | (10,021) |  |  | $ | (23,192) |  |  |
State benefit, net of federal benefit | (370) |  |  | (148) |  |  | (1,285) |  |  |
Foreign tax rate difference | (259) |  |  | (358) |  |  | (140) |  |  |
Valuation allowance against future tax benefits | 13,564 |  |  | 6,029 |  |  | 26,410 |  |  |
Gain on sale of foreign subsidiaries | — |  |  | 3,008 |  |  | — |  |  |
Sub-part F income | — |  |  | 791 |  |  | — |  |  |
Loss on conversion of debt | — |  |  | — |  |  | 2,015 |  |  |
Research and development credits | (2,222) |  |  | (1,415) |  |  | (2,355) |  |  |
Share-based compensation | 1,010 |  |  | (879) |  |  | (1,134) |  |  |
Non-deductible officers compensation | 108 |  |  | 1,449 |  |  | — |  |  |
True-up of prior year provisions | 2,123 |  |  | 1,681 |  |  | — |  |  |
Other | (48) |  |  | 54 |  |  | 429 |  |  |
(Benefit) Provision for income taxes | $ | (465) |  |  | $ | 191 |  |  | $ | 748 |  |  |
Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows (in thousands):
Balance at December 31, 2020 | $ | 39,631 |
Increases related to current and prior year tax positions | 1,998 |
Balance at December 31, 2021 | 41,629 |
Increases related to current and prior year tax positions | 1,286 |
Balance at December 31, 2022 | $ | 42,915 |

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