Note 5 - Other Long-Term Obligations and Commitments (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Lease, Weighted Average Discount Rate, Percent	9.71%
Operating Lease, Cost	$ 179,000	$ 165,000
Operating Lease, Payments	$ 191,000	$ 178,000
Operating Lease, Weighted Average Remaining Lease Term	7 months 24 days	9 months 19 days
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	$ 601,000
Lessee, Operating Lease, Liability, to be Paid, Year One	149,000
Operating Lease, Expense	$ 204,000	$ 141,000