Note M - Leases - Operating Lease (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Assets [Abstract]
Other Assets, Noncurrent	$ 3,243,000	$ 4,697,000
Liabilities, Noncurrent [Abstract]
Other Liabilities, Noncurrent	500,000	$ 750,000
2024 (remaining)	29,000
2025	0
2026 and thereafter	0
Total undiscounted operating lease payments	29,000
Less: Imputed interest	0
Present value of operating lease liabilities	$ 29,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Right-of-use assets (recorded in other non-current assets)	$ 29,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]
Current lease liabilities (recorded in other current liabilities)	$ 29,000
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Operating Lease, Liability, Noncurrent	$ 0
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]
Total operating lease liabilities	$ 29,000
Weighted-average remaining lease term for operating leases (years) (Year)	29 days
Weighted-average discount rate for operating leases	3.74%

Amount of lessee's undiscounted obligation for lease payment for operating lease due after the first year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.