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13. INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure Abstract |
Schedule of Effective Income Tax Rate Reconciliation | The effective tax rate of our provision (benefit) for income taxes differs from the Federal statutory rate as follows:
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Statutory rate |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
Compensation related |  |  | (0.5 | )% |  |  | (8.2 | )% |  |  | 0.0 | %
Share-based compensation |  |  | (2.2 | )% |  |  | 25.1 | % |  |  | 0.0 | %
Net operating loss expiration |  |  | (9.0 | )% |  |  | (16.2 | )% |  |  | (47.5 | )%
Tax credits |  |  | 1.5 | % |  |  | 1.4 | % |  |  | 2.2 | %
Change in valuation allowance |  |  | (10.8 | )% |  |  | (23.1 | )% |  |  | 24.3 | %
Total |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | %
Schedule of Deferred Tax Assets | Deferred tax assets are summarized as follows (in thousands):
|  | December 31, |
|  | 2022 |  |  | 2021 |
Deferred tax assets |  |  |  |  |  |  |  |
Reserves |  | $ | 651 |  |  | $ | 634 |
Net operating loss carryforwards |  |  | 92,469 |  |  |  | 90,593 |
R&D credit carryforwards |  |  | 9,628 |  |  |  | 8,984 |
Depreciation/amortization deferred |  |  | 19,787 |  |  |  | 17,417 |
Operating lease liabilities |  |  | 3,292 |  |  |  | 1,222 |
Other |  |  | 7,360 |  |  |  | 6,701 |
Total deferred tax assets |  |  | 133,187 |  |  |  | 125,551 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Operating lease right-of-use assets |  |  | (3,062 | ) |  |  | (1,171 | )
Total deferred tax liabilities |  |  | (3,062 | ) |  |  | (1,171 | )
Net valuation allowances |  |  | (130,125 | ) |  |  | (124,380 | )
Deferred tax assets |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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