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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Tax Disclosure [Abstract] |
Schedule of components of income tax expense (benefit) | Total loss before income taxes for the years ended December 31 , 2021 , 2020 and 2019 did not include a foreign component. The components of benefits for income taxes were as follows for the period ended December 31 (in thousands):
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Current expense: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |  |  | $ | — |
State |  |  | 5 |  |  |  | (53 | ) |  |  | 2 |
|  |  | 5 |  |  |  | (53 | ) |  |  | 2 |
Deferred |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | — |  |  |  | — |  |  |  | — |
State |  |  | — |  |  |  | — |  |  |  | — |
|  |  | — |  |  |  | — |  |  | $ | — |
Total |  | $ | 5 |  |  | $ | (53 | ) |  | $ | 2 |
Schedule of deferred tax assets and liabilities | The components of the Company’s net deferred tax liabilities and related valuation allowance are as follows at December 31 (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Deferred tax assets |  |  |  |  |  |  |  |
Interest expense limitations |  | $ | 12,205 |  |  | $ | 8,225 |
Tax credit carryforwards |  |  | 1,630 |  |  |  | 1,623 |
Net operating loss carryforwards |  |  | 39,714 |  |  |  | 31,732 |
Stock based compensation |  |  | 3,233 |  |  |  | 2,037 |
Operating lease liabilities |  |  | 404 |  |  |  | 510 |
Others |  |  | 1,753 |  |  |  | 2,285 |
Total Deferred Tax Assets |  |  | 58,939 |  |  |  | 46,412 |
Valuation allowance |  |  | (56,643 | ) |  |  | (43,514 | )
Total Deferred Tax Assets |  |  | 2,296 |  |  |  | 2,898 |
Deferred Tax Liabilities: |  |  |  |  |  |  |  |
Amortization of intangibles |  |  | (1,975 | ) |  |  | (2,486 | )
Other |  |  | (2 | ) |  |  | — |
Operating lease right-of-use assets |  |  | (319 | ) |  |  | (412 | )
Total Deferred Tax Liabilities |  | $ | (2,296 | ) |  | $ | (2,898 | )
Schedule of effective income tax rate reconciliation | The reconciliation between U.S. federal income taxes at the statutory rate and the Company’s benefit from income taxes are as follows for the year ended December 31:
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Statutory Federal Income Tax Rate |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
State taxes, net of federal tax benefit |  |  | 2.8 | % |  |  | 2.7 | % |  |  | 5.0 | %
Debt discount and interest limitation |  |  | (10.1 | )% |  |  | 1.7 | % |  |  | 0.0 | %
In-process research and development |  |  | 0.0 | % |  |  | 0.0 | % |  |  | (11.0 | )%
Return to provision adjustments and carryback |  |  | 2.7 | % |  |  | (11.2 | )% |  |  | 0.0 | %
Others |  |  | (1.6 | )% |  |  | (0.8 | )% |  |  | (0.8 | )%
Change in valuation allowance |  |  | (14.8 | )% |  |  | (13.2 | )% |  |  | (14.2 | )%
Income Tax Benefit |  |  | 0.0 | % |  |  | 0.2 | % |  |  | 0.0 | %

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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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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