Stock Option - Plan Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	May 31, 2020	Dec. 31, 2018	Dec. 31, 2012
Stock Option
Stock-based compensation expense, allocated		$ 1,464,000	$ 1,649,000	$ 435,000
Basic earnings per share from share based compensation costs		$ 0.04	$ 0.04	$ 0.01
Diluted earnings per share from share based compensation costs		$ 0.04	$ 0.04	$ 0.01
Proceeds from stock option exercises		$ 85,000	$ 155,000
2012 Employee Stock Option Plan
Stock Option
Shares authorized (in shares)		1,900,000
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)		521,580	523,080	214,080	235,680
Exercisable, end of period		247,628	176,752	98,176
Available for grant (in shares)		0
Granted		37,500	338,000	0
Exercised		39,000	29,000	8,600
Number of Stock options settled by exchange of shares		29,600	1,000
Shares converted (in shares)		10,150	153	4,604
Deferred tax benefit		$ 0	$ 0	$ 0
Unearned stock based compensation		$ 1,971,000	$ 2,489,000
Vested		109,876	107,576	44,776
Fair Value		$ 981,000	$ 1,040,000	$ 244,000
Proceeds from stock option exercises		$ 84,000	$ 155,000	$ 0
2012 Non-Employee Stock Option Plan
Stock Option
Shares authorized (in shares)								100,000
Term		10 years
Vesting rights percentage		20.00%
Outstanding (in shares)		20,400	20,400	12,000	24,000
Exercisable, end of period		13,920	11,280	6,240
Available for grant (in shares)		0
Granted		0	9,600	0
Exercised		0	1,200	2,400
Deferred tax benefit		$ 0	$ 4,000	$ 6,000
Conversion of stock, shares issued			258	612
Unearned stock based compensation		$ 46,000	$ 70,000
Vested		2,640	6,240	5,520
Fair Value			$ 24,000	$ 39,000	$ 18,000
Proceeds from stock option exercises		$ 0	$ 0	$ 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)		75,000	89,000	70,100	96,800
Exercisable, end of period		50,720	45,040	29,960
Available for grant (in shares)		0
Granted		0	23,500	0
Exercised		14,000	4,600	3,200
Deferred tax benefit		$ 44,000	$ 12,000	$ 6,000
Conversion of stock, shares issued		7,235	2,075	1,518
Unearned stock based compensation		$ 135,000	$ 265,000
Vested		19,680	19,680	19,680
Fair Value		$ 149,000	$ 160,000	$ 133,000
Proceeds from stock option exercises		$ 0	$ 0	$ 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	26,900	10,000
Exercisable, end of period		18,760	7,380	2,000
Available for grant (in shares)		43,100
Granted		30,000	16,900	10,000
Exercised		0	0	0
Unearned stock based compensation		$ 344,000	$ 135,000
Vested		11,380	5,380	2,000
Fair Value		$ 129,000	$ 55,000	$ 12,000
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)		5,000
Exercisable, end of period		1,000
Available for grant (in shares)		945,000
Granted		5,000
Exercised		0
Unearned stock based compensation		$ 74,000
Vested		1,000
Fair Value		$ 20,000