Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Narrative)

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Income Taxes (Details Narrative) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Tax Credit Carryforward [Line Items]      
Deferred Tax Assets, Valuation Allowance $ 31,023 $ 25,206 $ 19,700
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 5,800 5,500  
Operating loss carryforwards $ 38,100    
Operating loss carryforwards, expiration year 2032    
Operating loss carryforwards with no expiration $ 63,300    
Sale of net operating losses $ 1,300 $ 1,100  
[custom:LimitationsOnNetOperatingLossDeductibilityDescription] In addition, the Tax Cuts and Jobs Act, signed into law on December 22, 2017 imposes significant additional limitations on the deductibility of interest and limits NOL deductions to 80% of net taxable income for losses arising in taxable years beginning after December 31, 2017    
Federal and State research and development tax credit carry forwards [Member]      
Tax Credit Carryforward [Line Items]      
Operating loss carryforwards $ 3,200