Note 8 - Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) lease	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Number of operating leases | lease	1
Amortization of right of use assets with finance lease	$ 8,500	$ 4,800	$ 1,100
Interest expense recognized for financing lease liabilities	600	400	100
Operating lease expenses	200	200	$ 100
Financing lease right-of-use assets, net	10,282	12,905
Operating Lease, Right-of-Use Asset	$ 540	$ 694
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Total right-of-use assets	$ 10,822	$ 13,599
Finance Lease, Liability, Current	5,456	5,969
Operating Lease, Liability, Current	$ 134	$ 122
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Finance Lease, Liability, Noncurrent	$ 4,915	$ 4,917
Operating Lease, Liability, Noncurrent	$ 450	$ 585
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Present value of lease obligations	$ 10,955	$ 11,593
Office Space
Lessee, Lease, Description [Line Items]
Term of financing leases	5 years
Minimum
Lessee, Lease, Description [Line Items]
Term of financing leases	3 years
Minimum | Office Space
Lessee, Lease, Description [Line Items]
Term of financing leases	6 years
Maximum
Lessee, Lease, Description [Line Items]
Term of financing leases	5 years
Maximum | Office Space
Lessee, Lease, Description [Line Items]
Term of financing leases	8 years