Note M - Leases - Operating Lease (Details) $ in Thousands	Mar. 31, 2020 USD ($)
2020 (remaining)	$ 464
2021	627
2022	544
2023	340
2024	114
Total undiscounted operating lease payments	2,089
Less: Imputed interest	$ (126)
Weighted-average remaining lease term for operating leases (years) (Year)	3 years 182 days
Weighted-average discount rate for operating leases	3.59%
Accrued Expenses And Other Liabilities And Other Long-term Liabilities [Member]
Present value of operating lease liabilities	$ 1,963
Right-of-use assets (recorded in other non-current assets)	1,963
Total operating lease liabilities	1,963
Other Current Liabilities [Member]
Current lease liabilities (recorded in other current liabilities)	619
Other Noncurrent Liabilities [Member]
Long-term lease liabilities (recorded in other long-term liabilities)	$ 1,344