Consolidated Condensed Statement of Changes in Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Beginning Balance (in shares) at Jun. 30, 2019		33,183,730
Beginning Balance at Jun. 30, 2019	$ 80,125,858	$ 33,183	$ 42,488,913	$ 37,603,762	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted common stock (in shares)		59,028
Issuance of restricted common stock		$ 59	(59)
Forfeitures of restricted stock (in shares)		(8,248)
Forfeitures of restricted stock	0	$ (8)	8
Common share repurchases, including shares surrendered for tax withholding	(1,362,424)				(1,362,424)
Retirements of treasury stock (in shares)		(231,376)
Retirements of treasury stock	0	$ (231)	(1,362,193)		1,362,424
Stock-based compensation	332,013		332,013
Net income (loss) attributable to common stockholders	2,792,820			2,792,820
Common stock cash dividends	(3,306,408)			(3,306,408)
Ending Balance (in shares) at Sep. 30, 2019		33,003,134
Ending Balance at Sep. 30, 2019	$ 78,581,859	$ 33,003	41,458,682	37,090,174	0
Beginning Balance (in shares) at Jun. 30, 2020	32,956,469	32,956,469
Beginning Balance at Jun. 30, 2020	$ 74,124,482	$ 32,956	41,291,446	32,800,080
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common share repurchases, including shares surrendered for tax withholding	(7,348)				(7,348)
Retirements of treasury stock (in shares)		(2,632)
Retirements of treasury stock	0	$ (3)	(7,345)		7,348
Stock-based compensation	300,351		300,351
Net income (loss) attributable to common stockholders	(7,135,148)			(7,135,148)
Common stock cash dividends	$ (823,846)			(823,846)
Ending Balance (in shares) at Sep. 30, 2020	32,953,837	32,953,837
Ending Balance at Sep. 30, 2020	$ 66,458,491	$ 32,953	$ 41,584,452	$ 24,841,086	$ 0