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Note E - Convertible Preferred Stock (Details Textual) - USD ($)	Jan. 30, 2018	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022
Preferred Stock, Shares Authorized (in shares)			1,000,000.0
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] | 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

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