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Stockholder's Equity - Narrative (Details) - USD ($)	1 Months Ended			3 Months Ended	12 Months Ended
	Apr. 30, 2025	Mar. 31, 2025	Feb. 28, 2025	Apr. 30, 2025	Apr. 30, 2025	Apr. 30, 2024	Mar. 12, 2025	Aug. 31, 2023
Equity [Abstract]
Common stock, shares authorized (in shares)	5,000,000			5,000,000	5,000,000	5,000,000
Common stock, par value (in USD per share)	$ 2.50			$ 2.50	$ 2.50	$ 2.50
Common stock, shares outstanding (in shares)	2,839,000			2,839,000	2,839,000	2,839,000
Number of Shares authorized to be repurchased (in shares)								100,000
Treasury stock (in shares)	1,039	31,148	1,019	33,206	33,206	66,191
Treasury stock, value					$ 1,594,000	$ 1,992,000
Number of shares authorized to be repurchased	100,603	101,642	32,790	100,603	100,603
Number of additional shares authorized to be repurchased							100,000

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- Definition

Stock Repurchase Program, Number of Additional Shares Authorized to be Repurchased

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- Definition

Treasury Stock, Value Excluding Broker Commissions and Fees, Acquired, Cost Method

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- Definition

Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

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- Definition

Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of shares remaining authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Number of shares that have been repurchased during the period and are being held in treasury.

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