Note J - Leases - Supplement Balance Sheet Information Related to Lease (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
less: accumulated depreciation and amortization	$ (31)
Lease liabilities	559
Operating lease right-of-use assets	1,785
Current portion of operating lease liabilities	395
Operating lease liabilities, less current portion	2,142
Total operating lease liabilities	$ 2,537
Finance leases (Year)	3 years
Operating leases (Year)	6 years
Finance leases	7.70%
Operating leases	7.50%
Property and Equipment, At Cost [Member]
Property and equipment, at cost	$ 1,013
Accumulated Depreciation and Amortization [Member]
less: accumulated depreciation and amortization	(306)
Property and Equipment, Net [Member]
Property and equipment, net	707
Other Current Liabilities [Member]
Other current liabilities	218
Other Noncurrent Liabilities [Member]
Other long-term liabilities	341
Operating Lease Right-of-Use Assets [Member]
Operating lease right-of-use assets	1,785
Current Portion of Operating Lease Liabilities [Member]
Current portion of operating lease liabilities	395
Operating Lease Liabilities, Less Current Portion [Member]
Operating lease liabilities, less current portion	$ 2,142