Note 7 - New Markets Tax Credit Financing Transaction (Details Textual) - USD ($) $ in Thousands		9 Months Ended
	Mar. 09, 2018	Sep. 30, 2023	Dec. 31, 2022
Other Liabilities, Noncurrent		$ 3,053	$ 3,066
Debt Issuance Costs, Net		1,161	1,364
New Markets Tax Credit Financing Program [Member]
Financing Receivable, after Allowance for Credit Loss	$ 6,700
Recapture Percentage	100.00%
Recapture Period (Year)	7 years
Other Liabilities, Noncurrent		2,800	$ 2,800
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax		$ 2,800
Debt Issuance Costs, Net	$ 700
New Markets Tax Credit Financing Program [Member] | PNC Capital Markets LLC [Member]
Financing Receivable, after Allowance for Credit Loss	$ 3,500