Note 10 - Leases - Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Remaining lease term (in years) (Year)	2 years 8 months 1 day	5 months 23 days
Discount rate	13.29%	14.66%
Operating lease expense	$ 144	$ 127
Research and Development Expense [Member]
Operating lease expense	67	68
Selling and Marketing Expense [Member]
Operating lease expense	24	15
General and Administrative Expense [Member]
Operating lease expense	$ 53	$ 44