Note J - Leases - Supplement Balance Sheet Information Related to Lease (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Lease liabilities, finance leases	$ 11	$ 21
Operating lease right-of-use assets	1,090	1,141
Total operating lease right-of-use assets	1,090	1,141
Current portion of operating lease liabilities	356	356
Operating lease liabilities, less current portion	1,144	1,232
Total operating lease liabilities	$ 1,500	$ 1,588
Finance leases (years) (Year)	2 years	1 year
Operating leases (years) (Year)	4 years	4 years
Finance leases	14.30%	12.00%
Operating leases	7.50%	7.50%
Property and Equipment, At Cost [Member]
Property and equipment, at cost	$ 1,031	$ 1,031
Accumulated Depreciation and Amortization [Member]
less: accumulated depreciation and amortization	(683)	(651)
Property and Equipment, Net [Member]
Property and equipment, net	348	380
Other Current Liabilities [Member]
Other current liabilities	7	15
Other Noncurrent Liabilities [Member]
Other long-term liabilities	4	6
Operating Lease Right-of-Use Assets [Member]
Operating lease right-of-use assets	1,090	1,141
Total operating lease right-of-use assets	1,090	1,141
Current Portion of Operating Lease Liabilities [Member]
Current portion of operating lease liabilities	356	356
Operating Lease Liabilities, Less Current Portion [Member]
Operating lease liabilities, less current portion	$ 1,144	$ 1,232