Note H - Commitments and Contingencies - Supplement Balance Sheet Information Related to Lease (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
less: accumulated depreciation and amortization	$ (1,726)	$ (1,560)
Lease liabilities	194	404
Operating lease right-of-use assets	1,350	1,537
Total operating lease right-of-use assets	1,350	1,537
Current portion of operating lease liabilities	327	284
Operating lease liabilities, less current portion	1,587	1,901
Total operating lease liabilities	$ 1,914	$ 2,185
Finance leases (Year)	1 year	2 years
Operating leases (Year)	5 years	6 years
Finance leases	8.50%	7.70%
Operating leases	7.50%	7.50%
Property and Equipment, At Cost [Member]
Property and equipment, at cost	$ 1,031	$ 1,013
Accumulated Depreciation and Amortization [Member]
less: accumulated depreciation and amortization	(523)	(398)
Property and Equipment, Net [Member]
Property and equipment, net	508	615
Other Current Liabilities [Member]
Other current liabilities	172	236
Other Noncurrent Liabilities [Member]
Other long-term liabilities	22	168
Operating Lease Right-of-Use Assets [Member]
Operating lease right-of-use assets	1,350	1,537
Total operating lease right-of-use assets	1,350	1,537
Current Portion of Operating Lease Liabilities [Member]
Current portion of operating lease liabilities	327	284
Operating Lease Liabilities, Less Current Portion [Member]
Operating lease liabilities, less current portion	$ 1,587	$ 1,901