The percent of discount on the common stock purchasable.

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

+ References

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The cash inflow associated with the amount received from the stock plan during the period.

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Amount of noncash expense for share-based payment arrangement.

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- Definition

Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

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Net number of non-option equity instruments granted to participants.

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Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Note 9 - Equity Plans and Dividends (Details Textual) - USD ($)	3 Months Ended				9 Months Ended
	Mar. 31, 2026	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2020	Dec. 31, 2017
Share-Based Payment Arrangement, Noncash Expense					$ 3,963,000	$ 3,428,000
Proceeds from Stock Plans					85,000	56,000
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.33		$ 0.31
Dividends, Common Stock		$ 5,000,000		$ 4,600,000	$ 4,983,000	4,593,000
The 2015 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)								3,500,000	3,000,000
Share-Based Payment Arrangement, Noncash Expense			$ 1,200,000			$ 3,400,000
The 2015 Equity Incentive Plan [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)			0		182,493	263,974
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures (in shares)	0		0		0	0
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 25,200,000				$ 25,200,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					11 years 1 month 13 days
The 2015 Equity Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)					75,662	100,449
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures (in shares)	1,574		101		4,818	2,117
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 12,100,000				$ 12,100,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					9 years 2 months 1 day
The 2025 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)							3,000,000
The 2025 Equity Incentive Plan [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)			0			0
The 2025 Equity Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)	1,000				9,844
The Plans [Member]
Share-Based Payment Arrangement, Noncash Expense	$ 1,300,000				$ 4,000,000
The 2017 Employee Stock Purchase Plan [Member]
Common Stock, Discount, Percent										5.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)	0		0		3,657	3,645
Proceeds from Stock Plans					$ 85,000	$ 56,000