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Income Taxes (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax asset:    
Net operating loss carryover $ 18,154 $ 17,801
Expenses capitalized under IRC 263(a) 37 37
Tax credits (AMT) 57 57
Valuation allowance (18,248) (17,895)
Total tax asset $ 0 $ 0