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The tax effect of temporary differences between GAAP accounting and federal income tax accounting creating deferred income tax assets and liabilities were as follows: (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets    
U.S. net operating loss carry forward $ 2,600 $ 1,367
Non-deductible reserves 1,390 1,609
Tax credits 4,454 4,631
Fixed assets 24 15
Intangibles 1,738 1,959
Valuation allowance (10,124) (9,513)
Net deferred tax assets 82 68
Deferred tax liabilities    
Fixed assets (45) (28)
Other (37) (40)
Net deferred tax liabilities (82) (68)
Deferred asset, net