Note A - Overview and significant Accounting Policies (Details Textual) $ / shares in Units, $ in Millions		3 Months Ended
	Jan. 30, 2018 USD ($) $ / shares shares	Mar. 31, 2020
Number of Reportable Segments		1
Sale of Stock, Number of Shares Issued in Transaction (in shares)	9,926
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage		5.00%
Securities Purchase Agreement [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 1
Securities Purchase Agreement [Member] | Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage		5.00%
Securities Purchase Agreement [Member] | Series A Preferred Stock [Member] | Wipro [Member]
Sale of Stock, Number of Shares Issued in Transaction (in shares)	9,926
Sale of Stock, Consideration Received on Transaction | $	$ 9.9
Preferred Stock, Dividend Rate, Percentage	5.00%
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	16.00%