Note 3 - Miscellaneous Financial Information - Schedule of Revenue by Major Customer (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Customer A [Member]
Concentration Risk, Percentage	53.00%	21.00%	0.00%
Customer B [Member]
Concentration Risk, Percentage	24.00%	0.00%	0.00%
Customer C [Member]
Concentration Risk, Percentage	10.00%	0.00%	0.00%
Customer D [Member]
Concentration Risk, Percentage	0.00%	52.00%	71.00%
Customer E [Member]
Concentration Risk, Percentage	0.00%	15.00%	17.00%
Five Customers [Member]
Concentration Risk, Percentage	87.00%	88.00%	88.00%