Note 3 - Revenue (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2020
Contract with Customer, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price and Input Costs	$ 6,500,000
Contract with Customer, Asset, after Allowance for Credit Loss, Total	2,538,373	$ 494,281	$ 500,000
Contract with Customer, Liability, Total	1,650,426	786,657
Transferred over Time [Member]
Contract with Customer, Liability, Total	$ 1,500,000	$ 200,000	$ 800,000