Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Unearned ESOP Shares [Member]	Total
Balance, beginning at Jun. 30, 2019	$ 1,009,958	$ 18,731,975	$ (1,299)	$ 20,022,132	$ (7,632,556)	$ (204,706)	$ 31,925,504
Balance, beginning, shares at Jun. 30, 2019	2,401,213				628,661
Comprehensive income (loss):
Net income (loss)				206,975			206,975
Other comprehensive income (loss), net of tax			972				972
Total comprehensive income (loss)							207,947
Stock options exercised		51,300			$ 29,700		81,000
Stock options exercised, shares	3,600				(3,600)
Stock-based compensation		141,450					141,450
Dividends paid on common stock per share				(1,791,094)			(1,791,094)
Purchase of treasury stock					$ (47,949)		(47,949)
Purchase of treasury stock, shares	(2,180)				2,180
Balance, ending at Mar. 31, 2020	$ 1,009,958	18,924,725	(327)	18,438,013	$ (7,650,805)	(204,706)	30,516,858
Balance, ending, common shares at Mar. 31, 2020	2,402,633				627,241
Balance, beginning at Dec. 31, 2019	$ 1,009,958	18,858,202	(1,457)	19,138,895	$ (7,664,005)	(204,706)	31,136,887
Balance, beginning, shares at Dec. 31, 2019	2,401,033				628,841
Comprehensive income (loss):
Net income (loss)				(103,765)			(103,765)
Other comprehensive income (loss), net of tax			1,130				1,130
Total comprehensive income (loss)							(102,635)
Stock options exercised		17,520			$ 13,200		30,720
Stock options exercised, shares	1,600				(1,600)
Stock-based compensation		49,003					49,003
Dividends paid on common stock per share				(597,117)			(597,117)
Purchase of treasury stock
Balance, ending at Mar. 31, 2020	$ 1,009,958	18,924,725	(327)	18,438,013	$ (7,650,805)	(204,706)	30,516,858
Balance, ending, common shares at Mar. 31, 2020	2,402,633				627,241
Balance, beginning at Jun. 30, 2020	$ 1,009,958	19,073,213	(3,107)	18,797,589	$ (7,650,805)		$ 31,226,848
Balance, beginning, shares at Jun. 30, 2020	2,402,633				627,241		2,402,633
Comprehensive income (loss):
Net income (loss)				(1,061,297)			$ (1,061,297)
Other comprehensive income (loss), net of tax			871				871
Total comprehensive income (loss)							$ (1,060,426)
Stock options exercised, shares
Stock-based compensation		106,286					$ 106,286
Dividends paid on common stock per share				(1,201,316)			(1,201,316)
Sale of stock to ESOP	$ 33,333	3,841,553			$ 1,612,114	(5,487,000)
Sale of stock to ESOP, shares	300,000				(200,000)
Balance, ending at Mar. 31, 2021	$ 1,043,291	23,021,052	(2,236)	16,534,976	$ (6,038,691)	(5,487,000)	$ 29,071,392
Balance, ending, common shares at Mar. 31, 2021	2,702,633				427,241		2,702,633
Balance, beginning at Dec. 31, 2020	$ 1,043,291	22,995,640	(2,069)	17,605,090	$ (6,038,691)	(5,487,000)	$ 30,116,261
Balance, beginning, shares at Dec. 31, 2020	2,702,633				427,241		2,702,633
Comprehensive income (loss):
Net income (loss)				(1,070,114)			$ (1,070,114)
Other comprehensive income (loss), net of tax			(167)				(167)
Total comprehensive income (loss)							(1,070,281)
Stock-based compensation		25,412					25,412
Balance, ending at Mar. 31, 2021	$ 1,043,291	$ 23,021,052	$ (2,236)	$ 16,534,976	$ (6,038,691)	$ (5,487,000)	$ 29,071,392
Balance, ending, common shares at Mar. 31, 2021	2,702,633				427,241		2,702,633