Note 7 - Leases - Remaining Terms and Discount Rates (Details)	Jun. 30, 2022
Weighted average remaining lease terms (in years), operating leases (Year)	5 years 9 months 18 days
Weighted average remaining lease terms (in years), finance leases (Year)	3 years
Weighted average discount rate, operating leases	7.80%
Weighted average discount rate, finance leases	5.90%
Minimum [Member]
Remaining leases terms (in years), operating leases (Year)	1 year 3 months 18 days
Remaining leases terms (in years), finance leases (Year)	3 months 18 days
Discount rates, operating leases	6.30%
Discount rates, finance leases	2.80%
Maximum [Member]
Remaining leases terms (in years), operating leases (Year)	10 years 8 months 12 days
Remaining leases terms (in years), finance leases (Year)	4 years 10 months 24 days
Discount rates, operating leases	9.00%
Discount rates, finance leases	9.00%