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Note 2 - Supplemental Balance Sheet Information - Contract and Other Receivables (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Contract and other receivables $ 1,623 $ 1,853
Allowance for doubtful accounts (7) (7)
Contracts and other receivables, net $ 1,616 $ 1,846