Stock Options - Plan Information (Details) - USD ($)	1 Months Ended				12 Months Ended
	Dec. 31, 2022	May 31, 2020	Dec. 31, 2018	Dec. 31, 2012	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Stock Options
Stock-based compensation expense, allocated					$ 1,513,000	$ 1,733,000	$ 1,464,000
Basic earnings per share from share based compensation costs					$ 0.04	$ 0.05	$ 0.04
Diluted earnings per share from share based compensation costs					$ 0.04	$ 0.05	$ 0.04
Proceeds from stock option exercises					$ 54,000	$ 427,000	$ 85,000
2012 Employee Stock Option Plan
Stock Options
Shares authorized (in shares)				1,900,000
Threshold percentage of voting rights				10.00%
Premium on fair market value (as a percent)				110.00%
Term				10 years
Vesting rights percentage				20.00%
Outstanding (in shares)					361,036	363,036	521,580	523,080
Exercisable, end of period					277,636	190,960	247,628
Available for grant (in shares)					0
Granted						0	37,500
Exercised					2,000	147,544	39,000
Number of Stock options settled by withholding of shares						109,544	29,600
Shares withheld					46,570
Shares converted (in shares)					10,150
Proceeds from stock option exercises					$ 54,000	$ 427,000	$ 84,000
Deferred tax benefit					0	119,000	$ 0
Unearned stock based compensation					$ 275,000	$ 1,094,000
Vested					88,676	101,876	109,876
Fair Value					$ 847,000	$ 946,000	$ 981,000
2012 Non-Employee Stock Option Plan
Stock Options
Shares authorized (in shares)				100,000
Term				10 years
Vesting rights percentage				20.00%
Outstanding (in shares)					20,400	20,400	20,400	20,400
Exercisable, end of period					18,480	16,560	13,920
Available for grant (in shares)					0
Exercised					0	0	0
Proceeds from stock option exercises					$ 0	$ 0	$ 0
Deferred tax benefit					0
Unearned stock based compensation					$ 5,000	$ 24,000
Vested					1,920	2,640	2,640
Fair Value					$ 19,000	$ 24,000	$ 24,000
2018 Non-Employee Stock Option Plan
Stock Options
Shares authorized (in shares)			100,000
Term			10 years
Vesting rights percentage			20.00%
Outstanding (in shares)					64,900	68,900	75,000	89,000
Exercisable, end of period					62,200	59,500	50,720
Available for grant (in shares)					4,000
Exercised					0	6,100	14,000
Number of Stock options settled by withholding of shares						6,100
Shares withheld					2,700
Proceeds from stock option exercises					$ 0	$ 0	$ 0
Deferred tax benefit					$ 0	30,000	$ 44,000
Conversion of stock, shares issued					7,235
Unearned stock based compensation					$ 7,000	$ 59,000
Vested					2,700	14,880	19,680
Fair Value					$ 27,000	$ 124,000	$ 149,000
2018 Non-Employee Stock Option Plan | Options granted after December 2028
Stock Options
Granted					0
2020 Non-Employee Stock Option Plan
Stock Options
Shares authorized (in shares)		100,000
Term		10 years
Vesting rights percentage		20.00%
Outstanding (in shares)					51,900	56,900	56,900
Exercisable, end of period					38,520	30,140
Available for grant (in shares)					45,100
Granted						0	30,000
Exercised					3,000	0	0
Number of Stock options settled by withholding of shares					3,000
Shares withheld					2,151
Deferred tax benefit					$ 0
Unearned stock based compensation					$ 85,000	$ 215,000
Vested					11,380	11,380	11,380
Fair Value					$ 129,000	$ 129,000	$ 129,000
2020 Non-Employee Stock Option Plan | Options granted after May 2030
Stock Options
Granted					0
2022 Employee Stock Option Plan
Stock Options
Shares authorized (in shares)	950,000
Threshold percentage of voting rights	10.00%
Premium on fair market value (as a percent)	110.00%
Term	10 years
Vesting rights percentage	20.00%
Outstanding (in shares)					130,000	130,000	5,000
Exercisable, end of period					52,000	26,000	1,000
Available for grant (in shares)					820,000
Granted					0	130,000	5,000
Exercised					0	0	0
Unearned stock based compensation					$ 1,536,000	$ 2,066,000
Vested					26,000	26,000	1,000
Fair Value					$ 559,000	$ 553,000	$ 20,000
2022 Employee Stock Option Plan | Options granted after December 2032
Stock Options
Granted					0