Note E - Convertible Preferred Stock (Details Textual) - USD ($)		6 Months Ended
	Jan. 30, 2018	Jun. 30, 2022	Dec. 31, 2021
Preferred Stock, Shares Authorized (in shares)		1,000,000	1,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 1	$ 1
Wipro [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 1.00
Wipro [Member] | Common Stock [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)		100,000
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage		5.00%
Temporary Equity, Liquidation Preference		$ 2,200,000
Temporary Equity, Liquidation Preference Per Share (in dollars per share)		$ 220.82
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)		100.91
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
Stock Issued During Period, Value, New Issues	$ 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 Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)		9,926
Stock Repurchase Program, Authorized Amount		$ 9,926,000