Note 4 - Revenue Recognition (Details Textual) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Revenue from Contract with Customer, Excluding Assessed Tax, Total		$ 125,206	$ 102,773
Cost of Goods and Services Sold, Total		$ 93,821	$ 76,598
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Customers		1	1
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage		64.00%	63.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Customers		2	2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage		44.00%	69.00%
Contract Assets [Member] | Customer Concentration Risk [Member]
Number of Customers		2	2
Contract Assets [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage		100.00%	100.00%
Revision of Prior Period, Error Correction, Adjustment [Member]
Cost of Goods and Services Sold, Total	$ (800)
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total		$ 50,114	$ 37,774
Transferred at Point in Time [Member] | Revision of Prior Period, Error Correction, Adjustment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ (1,200)