Note 6 - Leases (Details Textual) $ in Thousands	1 Months Ended		12 Months Ended
	Aug. 31, 2024 USD ($)	Jul. 31, 2024	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Number of Leases Entered		2
Number of Leases Terminated	1
Lessee, Operating Lease, Remaining Lease Term (Year)			2 years 8 months 12 days
Lessee, Operating Lease, Liability, to be Paid			$ 816
Operating Lease Liabilities Extinguished Upon Early Lease Termination	$ 1		16,325	$ 335
Gain (Loss) on Termination of Lease, Net			491	491
Gain (Loss) on Termination of Lease	5,954		491	35
Termination of Lease, Reduction of Liability	16,325
Termination of Lease, Reduction of Right-of-use Asset	10,371
Lease Termination Liability	5,463		3,313	0
Lease Termination Liability, Reduction From Draw-down of Collateral	$ 2,150
Gain (Loss) On Early Termination Of Right-Of-Use Assets				35
Operating Lease, Impairment Loss				$ 2,570
Office Facilities in Northern California [Member]
Lessee, Operating Lease, Liability, to be Paid			$ 265
Office Facilities in Northern California [Member] | Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)			2 years
Office Facilities in Northern California [Member] | Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)			5 years