Note 2 - REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Percent of revenues	100.00%	100.00%
Transferred over Time [Member]
Percent of revenues	70.00%	50.00%
Transferred at Point in Time [Member]
Percent of revenues	30.00%	50.00%