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Income Taxes - Deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred income tax assets:    
Allowances not currently deductible $ 301 $ 183
Depreciation and amortization 9 308
Equity compensation not currently deductible 1,579 831
Net operating loss carryforwards 10,758 7,741
Expenses not deductible until paid 1,694 1,829
Other 142 153
Total gross deferred income tax assets before valuation allowance 14,483 11,045
Valuation allowance (13,008) (9,095)
Deferred income tax assets, net 1,475 1,950
Deferred income tax liabilities:    
Other (65) (15)
Total deferred income tax liabilities (65) (15)
Net deferred income tax assets 1,410 1,935
Net deferred income tax assets 1,475 1,950
Net deferred income tax liability (65) (15)
Net deferred income tax assets $ 1,410 $ 1,935