Note 10 - Debt (Details Textual) - USD ($) $ in Millions		3 Months Ended
	Sep. 02, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Interest Rate Swap [Member]
Derivative, Notional Amount				$ 30.0
The 2021 Swaps [Member]
Derivative, Notional Amount				$ 60.0
The 2021 Swaps One [Member]
Derivative, Notional Amount		$ 30.0
Derivative, Fixed Interest Rate		1.3055%		1.3055%
The 2021 Swaps Two [Member]
Derivative, Notional Amount		$ 30.0
Derivative, Fixed Interest Rate		1.318%		1.318%
Credit and Security Agreement with KeyBank [Member]
Long-Term Debt, Percentage Bearing Variable Interest, Amount		$ 52.5		$ 52.5
Debt, Weighted Average Interest Rate		1.96%		1.60%
Debt Instrument, Interest Rate, Effective Percentage		2.41%
Interest Expense, Debt, Total		$ 0.7	$ 0.8
Credit and Security Agreement with KeyBank [Member] | Term Loan [Member]
Long-Term Debt, Total		$ 112.5		$ 112.5
Credit and Security Agreement with KeyBank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 175.0
Debt Instrument, Term (Year)	5 years
Line of Credit Facility, Maximum Letters of Credit Capacity	$ 10.0
Line of Credit Facility, Maximum Swing Line Loan Capacity	$ 5.0