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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 carryforwards $ 19,830 $ 18,437
Stock-based compensation 742 576
Intangible Assets 2,923 3,848
Foreign net operating loss carryforwards 47,179 34,819
Unrealized gain or loss 1,686 1,130
Other, net 693 9
Total deferred tax assets 73,053 58,819
Deferred tax liabilities:    
Property, plant and equipment 0 (2)
Total deferred tax liability 0 (2)
Net deferred tax assets 73,053 58,817
Less valuation allowance (73,053) (58,817)
Net deferred tax assets, valuation allowance total $ 0 $ 0