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Note 2 - Supplemental Balance Sheet Information - Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Accounts payable $ 5,472 $ 12,550
Legal settlement 500 0
Accrued expenses 703 453
Compensation, benefits and related taxes 270 358
Other accrued expenses 71 13
Total accounts payable and accrued expenses $ 7,016 $ 13,374