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Subsequent events (Details - Textual)
$ in Thousands
Apr. 29, 2022
USD ($)
Subsequent events  
Principal and interest payments to be received as forgiveness $ 953
Paycheck Protection Program Loan  
Subsequent events  
Principal amount of loan obtained 1,499
Interest amount of loan obtained 31
Extinguishment of debt 1,499
Gain on extinguishment of debt $ 29