Stock-Based Compensation, Stock Options (Details) - USD ($)						12 Months Ended
		Nov. 11, 2020	Feb. 05, 2019	Oct. 26, 2015	Jul. 31, 2014	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Number of Shares [Abstract]
Outstanding, Beginning Balance (in shares)						562,864	569,264
Granted (in shares)						187,500	0
Exercised (in shares)						(82,342)	(6,400)
Forfeited (in shares)						(13,000)	0
Outstanding, Ending Balance (in shares)						655,022	562,864	569,264
Options Exercisable, Ending Balance (in shares)						451,322	501,664
Weighted Average Exercise Price [Abstract]
Outstanding, Beginning Balance (in dollars per share)						$ 9.31	$ 9.33
Granted (in dollars per share)						11.86	0
Exercised (in dollars per share)						8.42	9.57
Forfeited (in dollars per share)						11.50	0
Outstanding, Ending Balance (in dollars per share)						10.11	9.31	$ 9.33
Options Exercisable, Ending Balance (in dollars per share)						$ 9.18	$ 8.86
Weighted Average Remaining Contract Term [Abstract]
Outstanding, Ending Balance						4 years 5 months 12 days	3 years 4 months 20 days	4 years 4 months 24 days
Options Exercisable, Ending Balance						2 years 3 months 14 days	3 years 7 days
Aggregate Intrinsic Value [Abstract]
Outstanding, Ending Balance						$ 6,153,690	$ 1,744,623	$ 4,138,129
Options Exercisable, Ending Balance						$ 4,658,496	$ 1,778,377
Number of Shares [Abstract]
Granted (in shares)						187,500	0
Stock Options [Member]
Number of Shares [Abstract]
Granted (in shares)						187,500
Number of Shares [Abstract]
Nonvested, Beginning Balance (in shares)						60,400
Granted (in shares)						187,500
Vested (in shares)						(44,200)
Forfeited (in shares)						0
Nonvested, Ending Balance (in shares)						203,700	60,400
Weighted Average Exercise Price [Abstract]
Nonvested, Beginning Balance (in dollars per share)						$ 12.96
Granted (in dollars per share)						11.86
Vested (in dollars per share)						12.00
Forfeited (in dollars per share)						0
Nonvested, Ending Balance (in dollars per share)						$ 12.16	$ 12.96
Compensation expense						$ 107,000	$ 137,000
2019 Stock Incentive Plan [Member]
Fair Value of Option Granted [Abstract]
Dividend Yield		2.78%
Expected Term		10 years
Risk-Free Interest Rate		0.98%
Expected Life		10 years
Expected Volatility	[1]	25.56%
2019 Stock Incentive Plan [Member] | Stock Options [Member]
Number of Shares [Abstract]
Granted (in shares)						0
Number of Shares [Abstract]
Granted (in shares)						0
2014 Stock Incentive Plan [Member]
Fair Value of Option Granted [Abstract]
Dividend Yield			1.79%	1.39%
Expected Term			10 years	10 years
Risk-Free Interest Rate			2.71%	2.07%
Expected Life			10 years	10 years
Expected Volatility	[1]		16.17%	20.38%
2014 Stock Incentive Plan [Member] | Stock Options [Member]
Number of Shares [Abstract]
Granted (in shares)			27,000	207,000
Number of Shares [Abstract]
Granted (in shares)			27,000	207,000
2011 Stock Option Plan [Member]
Fair Value of Option Granted [Abstract]
Dividend Yield					1.50%
Expected Term					10 years
Risk-Free Interest Rate					2.58%
Expected Life					10 years
Expected Volatility	[1]				9.56%

[1] Weekly volatility is annualized by multiplying by the square root of 52.