Condensed Statements of Shareholders’ Equity (Unaudited) - USD ($)	Common Stock	Additional Paid-In Capital	Retained Earnings	Total
Balance beginning at Jun. 30, 2018	$ 82,887	$ 14,953,103	$ 7,541,734	$ 22,577,724
Balance beginning (in shares) at Jun. 30, 2018	8,288,659
Net income			157,161	157,161
Issuance of restricted stock	$ 300	(300)
Issuance of restricted stock (in shares)	30,000
Issuance of common stock upon exercise of options	$ 112	33,198		33,310
Issuance of common stock upon exercise of options (in shares)	11,167
Share-based compensation expense		257,493		257,493
Balance ending at Sep. 30, 2018	$ 83,299	15,243,494	7,698,895	23,025,688
Balance ending (in shares) at Sep. 30, 2018	8,329,826
Balance beginning at Jun. 30, 2018	$ 82,887	14,953,103	7,541,734	22,577,724
Balance beginning (in shares) at Jun. 30, 2018	8,288,659
Net income				537,679
Balance ending at Dec. 31, 2018	$ 83,842	15,641,714	8,079,412	23,804,968
Balance ending (in shares) at Dec. 31, 2018	8,384,184
Balance beginning at Sep. 30, 2018	$ 83,299	15,243,494	7,698,895	23,025,688
Balance beginning (in shares) at Sep. 30, 2018	8,329,826
Net income			380,517	380,517
Issuance of restricted stock	$ 100	(100)
Issuance of restricted stock (in shares)	10,000
Issuance of common stock upon exercise of options	$ 443	155,068		155,511
Issuance of common stock upon exercise of options (in shares)	44,358
Share-based compensation expense		243,252		243,252
Balance ending at Dec. 31, 2018	$ 83,842	15,641,714	8,079,412	23,804,968
Balance ending (in shares) at Dec. 31, 2018	8,384,184
Balance beginning at Jun. 30, 2019	$ 84,084	16,127,826	9,522,064	$ 25,733,974
Balance beginning (in shares) at Jun. 30, 2019	8,408,351			8,408,351
Net income			1,014,556	$ 1,014,556
Issuance of restricted stock	$ 325	(325)
Issuance of restricted stock (in shares)	32,500
Issuance of common stock upon exercise of options	$ 50	12,990		13,040
Issuance of common stock upon exercise of options (in shares)	5,000
Share-based compensation expense		209,954		209,954
Balance ending at Sep. 30, 2019	$ 84,459	16,350,445	10,536,620	26,971,524
Balance ending (in shares) at Sep. 30, 2019	8,445,851
Balance beginning at Jun. 30, 2019	$ 84,084	16,127,826	9,522,064	$ 25,733,974
Balance beginning (in shares) at Jun. 30, 2019	8,408,351			8,408,351
Net income				$ 2,199,612
Balance ending at Dec. 31, 2019	$ 84,784	16,647,320	11,721,676	$ 28,453,780
Balance ending (in shares) at Dec. 31, 2019	8,478,448			8,478,448
Balance beginning at Sep. 30, 2019	$ 84,459	16,350,445	10,536,620	$ 26,971,524
Balance beginning (in shares) at Sep. 30, 2019	8,445,851
Net income			1,185,056	1,185,056
Issuance of restricted stock	$ 150	(150)
Issuance of restricted stock (in shares)	15,000
Issuance of common stock upon exercise of options	$ 175	62,721		62,896
Issuance of common stock upon exercise of options (in shares)	17,597
Share-based compensation expense		234,304		234,304
Balance ending at Dec. 31, 2019	$ 84,784	$ 16,647,320	$ 11,721,676	$ 28,453,780
Balance ending (in shares) at Dec. 31, 2019	8,478,448			8,478,448