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Selected Balance Sheet Information - Schedule of Accrued employee benefits (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Selected Balance Sheet Information        
Accrued bonus expense $ 1,216     $ 886
Accrued vacation expense 100     92
Accrued compensation expense 87      
Total $ 1,403 $ 1,319 $ 788 $ 978