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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred Tax Assets:    
Net operating loss $ 23,719 $ 23,333
Research and development and other tax credits 8,384 6,297
Interest limitation carry forward 4,898 3,970
Accrued expenses 3,501 3,385
Capitalized research and development expenditures 3,586 0
Share-based compensation 3,145 4,220
Allowance for doubtful accounts 1,033 601
Lease liabilities 962 1,277
Sales return and allowances 163 195
Accrued settlement costs 50 235
Other 885 1,115
Deferred Tax Liabilities:    
Prepaid expenses (1,400) (1,337)
Right of use asset (867) (1,197)
Intangible assets (351) (263)
Property and equipment (77) (705)
Net Deferred Tax Assets 47,631 41,126
Less: Valuation allowance (47,631) (41,126)
Net Deferred Tax Assets after Valuation Allowance $ 0 $ 0