Note 4 - Operating Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2020 USD ($)
2021, operating leases	$ 1,266
2021, financing leases	22
2022, operating leases	1,222
2022, financing leases	22
2023, operating leases	1,155
2023, financing leases	22
2024, operating leases	1,099
2024, financing leases	60
2025, operating leases	1,100
2025, financing leases	0
2025 and thereafter, operating leases	4,795
2025 and thereafter, financing leases	0
Total operating lease payments	10,637
Total financing lease payments	126
Less imputed interest, operating leases	(1,821)
Less imputed interest, financing leases	(14)
Present value, operating leases	8,816
Present value, financing leases	$ 112