Note E - Convertible Preferred Stock (Details Textual) - USD ($)			1 Months Ended	12 Months Ended
	Jun. 30, 2022	Jan. 30, 2018	Jan. 30, 2018	Dec. 31, 2022	Dec. 31, 2021
Preferred Stock, Shares Authorized (in shares)				1,000,000	1,000,000
Stock Issued During Period, Value, New Issues				$ 1,077,000
Stock Redeemed or Called During Period, Value				$ 1,380,000
Common Stock, Par or Stated Value Per Share (in dollars per share)				$ 1	$ 1
Preferred Stock [Member]
Stock Issued During Period, Value, New Issues
Stock Redeemed or Called During Period, Value				9,723,000
Common Stock [Member]
Stock Issued During Period, Value, New Issues				100,000
Stock Redeemed or Called During Period, Value				$ (0)
Wipro [Member] | Common Stock [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 1.00
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage				5.00%
Preferred Stock, Convertible, Conversion Ratio (Rate)				10091.00%
Series A Preferred Stock [Member] | Wipro [Member]
Stock Issued During Period, Shares, New Issues (in shares)		9,926
Shares Issued, Price Per Share (in dollars per share)		$ 1,000	$ 1,000
Stock Issued During Period, Value, New Issues		$ 9,900,000	$ 9,900,000
Payments of Stock Issuance Costs		200,000
Proceeds from Issuance of Preferred Stock and Preference Stock		$ 9,900,000
Series A Preferred Stock [Member] | Wipro [Member] | Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)	100,000
Stock Redeemed or Called During Period, Shares (in shares)	9,926
Stock Redeemed or Called During Period, Value	$ 9,926,000