Note A - Overview and Significant Accounting Policies (Details Textual) $ in Millions		3 Months Ended
	Jan. 30, 2018 USD ($) shares	Mar. 31, 2021	Dec. 31, 2020
Number of Reportable Segments		3
Securities Purchase Agreement [Member] | Series A Preferred Stock [Member] | Wipro [Member]
Sale of Stock, Number of Shares Issued in Transaction (in shares)	9,926
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)	1,001,614
Convertible Preferred Stock, Shares Issued upon Conversion as Percent of Common Stock Outstanding			15.00%
Sale of Stock, Consideration Received on Transaction | $	$ 9.9