Note A - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Business Acquisitions (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jul. 01, 2020	Dec. 31, 2019
Goodwill, Ending Balance	$ 13,069		$ 6,243
SoundChip [Member]
Cash		$ 443
Property and equipment	456	456
Current assets		2,301
Other non-current assets		1,042
Current liabilities		(971)
Other long-term liabilities	(1,945)	(1,945)
Net tangible assets acquired		1,327
Deferred tax liability	(1,121)	(1,121)
Intangible assets		7,921
Goodwill, Ending Balance	6,826	6,826
Net assets acquired	13,944	14,952
SoundChip [Member] | Developed Technology Rights [Member]
Intangible assets	7,189	7,189
SoundChip [Member] | Backlog [Member]
Intangible assets	$ 55	54
SoundChip [Member] | Customer Relationships [Member]
Intangible assets		$ 678