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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation The difference between income taxes expected at the U.S. federal statutory income tax rate of 21% and the reported income tax expense (benefit) are summarized as follows:
Year Ended December 31,
20232022
Income tax (benefit) at statutory rate (continuing operations)$(8,800)$(9,537)
Income tax (benefit) at statutory rate (discontinued operation)(2,277)(1,148)
Valuation allowance6,319 12,894 
State income tax (benefit), net of federal benefit(1,289)(2,114)
Business tax credit net of reserves91 (575)
Non-deductible expenses (continuing operations)4,840 360 
Non-deductible expenses (discontinued operation)1,123 434 
Foreign income taxes at different rate22 (310)
Income tax expense (benefit)$29 $
Effective tax rate(0.05)%(0.01)%
Schedule of Provision Expense (Benefit) for Income Taxes
The provision expense (benefit) for income taxes consist of the following:

Year Ended December 31,
20232022
Current:
Federal$— $— 
State29 
Foreign— — 
Total current29 
Deferred:
Federal— — 
State— — 
Foreign— — 
Total deferred— — 
Total income tax (benefit) expense$29 $
Schedule of Components of Net Deferred Income Taxes
The components of net deferred income taxes consist of the following:

December 31,
20232022
Deferred tax assets:
Net operating loss$58,913 $47,662 
Unrealized loss on digital assets104 6,754 
Tax credits1,940 1,940 
Reserves and accruals62 332 
Leases - lease liability430 1,019 
Amortization of acquired intangibles4,726 2,624 
Other deferred tax assets603 686 
Gross deferred tax assets66,778 61,017 
Less valuation allowance(65,375)(59,057)
Total deferred tax assets1,403 1,960 
Deferred tax liabilities:
Amortization of acquired intangibles— — 
Leases - right of use asset(376)(931)
Other deferred tax liabilities(1,027)(1,029)
Total deferred tax liabilities(1,403)(1,960)
Net deferred tax liabilities$— $— 
Schedule of Reconciliation of Unrecognized Tax Benefits
The following is a tabular reconciliation of the total amounts of unrecognized tax benefits:

December 31,
20232022
Unrecognized tax benefits, beginning of period$1,757 $1,545 
Tax positions taken in prior periods:
Gross increases— — 
Gross decreases— — 
Tax positions taken in current period:
Gross increases— 212 
Settlements— — 
Lapse of statute of limitations— — 
Unrecognized tax benefits, end of period$1,757 $1,757