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Note 9 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Sep. 09, 2022	May 12, 2022
Loss Contingencies [Line Items]
Operating Lease, Right-of-Use Asset	$ 113,000		$ 113,000		$ 198,000
Operating Lease, Liability, Current	122,000		122,000		121,000
Imputed interest	6,000		6,000
Cost Reduction Plan [Member]
Loss Contingencies [Line Items]
Reduction In Work Force						20.00%
Restructuring Costs	$ 0	$ 0	0	$ 0
Total expenses			$ 400,000
2023 RIF [Member]
Loss Contingencies [Line Items]
Reduction In Work Force	25.00%		25.00%
Restructuring Costs	$ 0	0	$ 0	0
Total expenses			$ 200,000
Insurance Financing Arrangement [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Interest Rate During Period			8.42%
Line of Credit Facility, Expiration Period			9 months
Remaining balance under insurance financing arrangements	200,000		$ 200,000		$ 200,000
Corporate Office [Member]
Loss Contingencies [Line Items]
Lessee, operating lease, term of contract (Month)							39 months
Lessee, operating lease, renewal term (Month)							36 months
Operating Lease, Right-of-Use Asset	113,000		113,000
Operating Lease, Liability, Current	$ 122,000		$ 122,000
Lessee, Operating Lease, Discount Rate	10.75%		10.75%
Lessee, Operating Lease, Remaining Lease Term	10 months 24 days		10 months 24 days
Operating Lease, Expense	$ 32,000	$ 32,000	$ 97,000	$ 97,000
Imputed interest	6,000		6,000
Total remaining future minimum lease payments	$ 128,000		$ 128,000

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