Note 18 - Subsequent Events (Details Textual) - Subsequent Event [Member] - Reduction in Force Plan [Member] $ in Millions	Feb. 13, 2023 USD ($)
Restructuring and Related Cost, Number of Positions Eliminated, Expected Percent	17.00%
Restructuring and Related Cost, Expected Cost, Total	$ 1.5
Effect on Future Cash Flows, Amount	7.4
Reduced Salaries [Member]
Effect on Future Cash Flows, Amount	6.1
reduced Payroll Taxes and Benefits [Member]
Effect on Future Cash Flows, Amount	1.3
Reduced Stock Compensation [Member]
Effect on Future Cash Flows, Amount	0.7
Employee Severance [Member]
Restructuring and Related Cost, Expected Cost, Total	1.3
Other Restructuring [Member]
Restructuring and Related Cost, Expected Cost, Total	0.2
Stock Compensation [Member]
Restructuring and Related Cost, Expected Cost, Total	$ 0.6