Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivative Asset, Total	$ 2,978	$ 57
Long-Term Debt, Fair Value	112,500	112,500
Long-Term Debt, Gross	112,500	112,500
Fair Value, Nonrecurring [Member]
Assets, Fair Value Disclosure		0
Foreign Exchange Forward [Member] | Maximum [Member]
Derivative Asset, Total	100	100
Interest Rate Swap [Member]
Derivative Asset, Total	2,900	100
Investments Held in Rabbi Trust [Member]
Debt Securities, Available-for-Sale, Total	$ 200	$ 300