CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Jun. 30, 2019	$ 54,342,864	$ 24,488,147	$ (32,625,369)	$ 46,205,642
Balance (in shares) at Jun. 30, 2019	28,027,569
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of offering costs	$ 0	932,480	0	932,480
Issuance of common stock, net of offering costs (in shares)	630,500
Stock-based compensation	$ 0	212,380	0	212,380
Issuance of restricted stock	$ 0	0	0	0
Issuance of restricted stock (in shares)	325,000
Retirement of restricted stock	$ 0	0	0	0
Retirement of restricted stock (in shares)	(1,159)
Net income (loss)	$ 0	0	207,319	207,319
Balance at Sep. 30, 2019	$ 54,342,864	25,633,007	(32,418,050)	47,557,821
Balance (in shares) at Sep. 30, 2019	28,981,910
Balance at Jun. 30, 2019	$ 54,342,864	24,488,147	(32,625,369)	46,205,642
Balance (in shares) at Jun. 30, 2019	28,027,569
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				(5,133,891)
Balance at Mar. 31, 2020	$ 54,342,864	25,635,104	(37,759,260)	42,218,708
Balance (in shares) at Mar. 31, 2020	28,981,910
Balance at Sep. 30, 2019	$ 54,342,864	25,633,007	(32,418,050)	47,557,821
Balance (in shares) at Sep. 30, 2019	28,981,910
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	146,725	0	146,725
Net income (loss)	0	0	814,050	814,050
Balance at Dec. 31, 2019	$ 54,342,864	25,779,732	(31,604,000)	48,518,596
Balance (in shares) at Dec. 31, 2019	28,981,910
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	(144,628)	0	(144,628)
Net income (loss)	0	0	(6,155,260)	(6,155,260)
Balance at Mar. 31, 2020	$ 54,342,864	25,635,104	(37,759,260)	42,218,708
Balance (in shares) at Mar. 31, 2020	28,981,910
Balance at Jun. 30, 2020	$ 54,342,864	25,880,165	(38,787,452)	41,435,577
Balance (in shares) at Jun. 30, 2020	28,949,410
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	107,355	0	107,355
Issuance of restricted stock	$ 0	0	0	0
Issuance of restricted stock (in shares)	178,750
Retirement of restricted stock	$ 0	0	0	0
Retirement of restricted stock (in shares)	(162,500)
Net income (loss)	$ 0	0	874,266	874,266
Balance at Sep. 30, 2020	$ 54,342,864	25,987,520	(37,913,186)	42,417,198
Balance (in shares) at Sep. 30, 2020	28,965,660
Balance at Jun. 30, 2020	$ 54,342,864	25,880,165	(38,787,452)	41,435,577
Balance (in shares) at Jun. 30, 2020	28,949,410
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				4,429,570
Balance at Mar. 31, 2021	$ 55,932,808	25,575,521	(34,357,882)	47,150,447
Balance (in shares) at Mar. 31, 2021	29,852,950
Balance at Sep. 30, 2020	$ 54,342,864	25,987,520	(37,913,186)	42,417,198
Balance (in shares) at Sep. 30, 2020	28,965,660
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	87,938	0	87,938
Stock option exercises	$ 177,325	(62,326)	0	114,999
Stock option exercises (in shares)	126,666
Net income (loss)	$ 0	0	2,519,077	2,519,077
Balance at Dec. 31, 2020	$ 54,520,189	26,013,132	(35,394,109)	45,139,212
Balance (in shares) at Dec. 31, 2020	29,092,326
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	76,916	0	76,916
Stock option exercises	$ 1,412,619	(514,527)	0	898,092
Stock option exercises (in shares)	760,624
Net income (loss)	$ 0	0	1,036,227	1,036,227
Balance at Mar. 31, 2021	$ 55,932,808	$ 25,575,521	$ (34,357,882)	$ 47,150,447
Balance (in shares) at Mar. 31, 2021	29,852,950