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Note 11 - Debt (Details Textual) - Revolving Credit Facility [Member] - MUFG Union Bank, N.A. [Member] - USD ($)
$ in Thousands
Mar. 08, 2021
Jun. 30, 2022
Line of Credit Facility, Maximum Borrowing Capacity $ 10,000  
Long-term Line of Credit, Total   $ 0
Debt Issuance Costs, Gross   $ 38
London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument, Basis Spread on Variable Rate 2.25%