Note 5 - Leases (Details) $ in Thousands	15 Months Ended
	Mar. 31, 2022 USD ($) lease	Dec. 31, 2021 USD ($)
Leases [Abstract]
Term of financing leases	36 months
Number of operating leases | lease	1
Operating lease expenses	$ 20
Financing lease right-of-use assets, net	12,296	$ 9,128
Operating Lease, Right-of-Use Asset	$ 6	$ 25
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Total right-of-use assets	$ 12,302	$ 9,153
Finance Lease, Liability, Current	4,081	3,461
Operating Lease, Liability, Current	$ 6	$ 25
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Finance Lease, Liability, Noncurrent	$ 5,968	$ 4,599
Present value of lease obligations	$ 10,055	$ 8,085