Note 12 - Segment Information (Details Textual)		12 Months Ended
	Jan. 01, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Number of Reportable Segments		2
Revenue from Contract with Customer, Including Assessed Tax		$ 255,719,000	$ 230,517,000
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 0	$ 0
Foreign Tax Authority [Member] | Previously Reported [Member]
Income (Loss) Attributable to Parent, before Tax, Total	$ (615,000)