Note 10 - Commitments and Contingencies (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Lease, Expense	$ 169,000	$ 114,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	4 years
Lessee, Operating Lease, Liability, to be Paid, Total	$ 580,000