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Note 8 - Debt (Details Textual) - Banc of America Leasing and Capital [Member] - Equipment Loan Arrangement [Member] - Line of Credit [Member] $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)
Debt, Weighted Average Interest Rate	3.80%	3.80%
Interest Expense	$ 5	$ 10
Long-Term Debt, Weighted Average Interest Rate, at Point in Time	3.80%	3.80%
Long-Term Debt	$ 453	$ 453

Amount of the cost of borrowed funds accounted for as interest expense.

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.