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Note 7 - Trade Receivables (Details Textual) - USD ($)
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss, Current $ 2,548,000 $ 613,000 $ 332,000
Contract with Customer, Refund Liability, Current $ 2,204,000 $ 1,670,000 $ 1,583,000