Note M - Leases - Operating Lease (Details) $ in Thousands	Sep. 30, 2020 USD ($)
2020 (remaining)	$ 155
2021	627
2022	544
2023	340
2024	114
Total undiscounted operating lease payments	1,780
Less: Imputed interest	$ (93)
Weighted-average remaining lease term for operating leases (years) (Year)	3 years 14 days
Weighted-average discount rate for operating leases	3.60%
Accrued Expenses And Other Liabilities And Other Long-term Liabilities [Member]
Present value of operating lease liabilities	$ 1,687
Right-of-use assets (recorded in other non-current assets)	1,687
Total operating lease liabilities	1,687
Other Current Liabilities [Member]
Current lease liabilities (recorded in other current liabilities)	624
Other Noncurrent Liabilities [Member]
Long-term lease liabilities (recorded in other long-term liabilities)	$ 1,063