Stock Options - Plan Information (Details) - USD ($)	1 Months Ended				3 Months Ended		6 Months Ended
	Dec. 31, 2022	May 31, 2020	Dec. 31, 2018	Dec. 31, 2012	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock Options
Stock-based compensation expense, allocated					$ 386,000	$ 335,000	$ 757,000	$ 610,000
Basic earnings per share from share based compensation costs					$ 0.01	$ 0.01	$ 0.02	$ 0.01
Diluted earnings per share from share based compensation costs					$ 0.01	$ 0.01	$ 0.02	$ 0.01
Proceeds from stock option exercises							$ 54,000
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	478,980	361,036	478,980	363,036	521,580
Exercisable, end of period					265,660	289,728	265,660	289,728
Available for grant (in shares)					0		0
Exercised					0	31,600	2,000	31,600
Number of Stock options settled by withholding of shares						31,600		31,600
Shares withheld						20,567		20,567
Proceeds from stock option exercises						$ 0	$ 54,000	$ 0
Deferred tax benefit					$ 0	$ 52,000	0	$ 52,000
Unearned stock based compensation					$ 677,000		$ 677,000
Vested					67,600	74,000	76,700	84,700
Fair Value					$ 670,000	$ 724,000	$ 782,000	$ 849,000
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	20,400	20,400
Exercisable, end of period					18,480	15,840	18,480	15,840
Available for grant (in shares)					0		0
Proceeds from stock option exercises					$ 0	$ 0	$ 0	$ 0
Deferred tax benefit					0	$ 0	0	$ 0
Unearned stock based compensation					$ 15,000		$ 15,000
Vested					1,920	1,920	1,920	1,920
Fair Value					$ 19,000	$ 19,000	$ 19,000	$ 19,000
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	73,400	64,900	73,400	68,900	75,000
Exercisable, end of period					62,200	58,620	62,200	58,620
Available for grant (in shares)					4,000		4,000
Granted							0	0
Exercised						1,600	0	1,600
Number of Stock options settled by withholding of shares						1,600		1,600
Shares withheld						740		740
Proceeds from stock option exercises					$ 0	$ 0	$ 0	$ 0
Deferred tax benefit					0	$ 6,000	0	$ 6,000
Unearned stock based compensation					$ 20,000		$ 20,000
Vested					2,700	9,500	2,700	9,500
Fair Value					$ 27,000	$ 89,000	$ 27,000	$ 89,000
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	51,900	56,900	56,900	56,900
Exercisable, end of period					37,520	29,140	37,520	29,140
Available for grant (in shares)					45,100		45,100
Granted							0	0
Exercised					0	0	3,000	0
Number of Stock options settled by withholding of shares							3,000
Shares withheld							2,151
Proceeds from stock option exercises						$ 0		$ 0
Deferred tax benefit					$ 0	$ 0	$ 7,000	$ 0
Unearned stock based compensation					$ 137,000		$ 137,000
Vested					3,380	3,380	10,380	10,380
Fair Value					$ 34,000	$ 34,000	$ 113,000	$ 113,000
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		130,000
Exercisable, end of period					28,000		28,000
Available for grant (in shares)					820,000		820,000
Granted						10,000	0	10,000
Proceeds from stock option exercises					$ 0	$ 0	$ 0	$ 0
Deferred tax benefit					0	$ 0	0	$ 0
Unearned stock based compensation					$ 1,816,000		$ 1,816,000
Vested					2,000	2,000	2,000	2,000
Fair Value					$ 19,500	$ 19,500	$ 19,500	$ 19,500
2022 Employee Stock Option Plan | Options granted after December 2032
Stock Options
Granted							0