Stock Option - Plan Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	May 31, 2020	Dec. 31, 2018	Dec. 31, 2012
Stock Option
Stock-based compensation expense, allocated		$ 266,000	$ 322,000	$ 876,000	$ 1,134,000
Basic earnings per share from share based compensation costs		$ 0.01	$ 0.01	$ 0.02	$ 0.03
Diluted earnings per share from share based compensation costs		$ 0.01	$ 0.01	$ 0.02	$ 0.03
Proceeds from stock option exercises				$ 427,000	$ 82,000
2012 Employee Stock Option Plan
Stock Option
Shares authorized (in shares)		1,900,000		1,900,000
Premium on fair market value (as a percent)				110.00%
Term				10 years
Vesting rights percentage				20.00%
Outstanding (in shares)		363,036	522,580	363,036	522,580	521,580	523,080
Exercisable, end of period		178,984	236,652	178,984	236,652
Available for grant (in shares)		0		0
Granted		0	0	0	37,500
Exercised		115,944	30,800	147,544	38,000
Number of Stock options settled by withholding of shares		77,944	27,600	109,544	29,600
Withheld (in shares)		26,002	9,943	46,570	10,150
Shares converted (in shares)		38,000		38,000
Deferred tax benefit		$ 67,000	$ 0	$ 119,000	$ 0
Unearned stock based compensation		$ 1,306,000		$ 1,306,000
Vested		5,200	5,200	89,900	97,900
Fair Value		$ 33,000	$ 33,000	$ 881,000	$ 916,000
Proceeds from stock option exercises		$ 427,000	$ 36,000	$ 427,000	$ 81,000
2012 Employee Stock Option Plan | Options granted after December 2022
Stock Option
Granted				0
2012 Non-Employee Stock Option Plan
Stock Option
Shares authorized (in shares)										100,000
Threshold percentage of voting rights				10.00%
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		16,560	13,920	16,560	13,920
Available for grant (in shares)		0		0
Granted		0	0	0	0
Exercised		0	0	0	0
Deferred tax benefit		$ 0	$ 0	$ 0	$ 0
Unearned stock based compensation		$ 29,000		$ 29,000
Vested		720	2,640	720	2,640
Fair Value		$ 5,000	$ 24,000	$ 5,000	$ 24,000
Proceeds from stock option exercises		$ 0	$ 0	$ 0	$ 0
2012 Non-Employee Stock Option Plan | Options granted after December 2022
Stock Option
Granted					0
2018 Non-Employee Stock Option Plan
Stock Option
Shares authorized (in shares)									100,000
Term				10 years
Vesting rights percentage				20.00%
Outstanding (in shares)		71,900	77,500	71,900	77,500	75,000	89,000
Exercisable, end of period		62,500	53,220	62,500	53,220
Available for grant (in shares)		0		0
Granted		0	0	0	0
Exercised		1,500	1,600	3,100	11,500
Number of Stock options settled by withholding of shares		1,500	1,600	3,100	11,500
Withheld (in shares)		792	395	1,532	6,052
Deferred tax benefit		$ 6,000	$ 8,000	$ 12,000	$ 34,000
Unearned stock based compensation		$ 71,000		$ 71,000
Vested		5,380	5,380	14,880	19,680
Fair Value		$ 35,000	$ 35,000	$ 124,000	$ 149,000
Proceeds from stock option exercises		$ 0	$ 0	$ 0	$ 0
2018 Non-Employee Stock Option Plan | Options granted after December 2028
Stock Option
Granted				0
2020 Non-Employee Stock Option Plan
Stock Option
Shares authorized (in shares)								100,000
Term				10 years
Vesting rights percentage				20.00%
Outstanding (in shares)		56,900	56,900	56,900	56,900	56,900	26,900
Exercisable, end of period		30,140	18,760	30,140	18,760
Available for grant (in shares)		43,100		43,100
Granted		0	5,000	0	30,000
Exercised		0	0	0	0
Deferred tax benefit		$ 0	$ 0	$ 0	$ 0
Unearned stock based compensation		$ 248,000		$ 248,000
Vested		1,000		1,000	11,380
Fair Value		$ 16,000			$ 129,000
Proceeds from stock option exercises		$ 0	$ 0	$ 0	$ 0
2020 Non-Employee Stock Option Plan | Options granted after May 2030
Stock Option
Granted				0
2022 Employee Stock Option Plan
Stock Option
Shares authorized (in shares)	950,000
Premium on fair market value (as a percent)	110.00%
Threshold percentage of voting rights	10.00%
Term	10 years
Vesting rights percentage	20.00%
Outstanding (in shares)		10,000		10,000		5,000
Exercisable, end of period		2,000		2,000
Available for grant (in shares)		940,000		940,000
Granted		0	0	10,000
Exercised		0		0
Deferred tax benefit		$ 0		$ 0
Unearned stock based compensation		$ 68,000		$ 68,000
Vested		0		2,000
Fair Value		$ 0		$ 19,500
Proceeds from stock option exercises				$ 0
2022 Employee Stock Option Plan | Options granted after December 2032
Stock Option
Granted				0