CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Jun. 30, 2017	$ 54,243,816	$ 14,489,042	$ (34,620,578)	$ 34,112,280
Balance (in shares) at Jun. 30, 2017	21,629,685
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	119,103	0	119,103
Retirement of restricted stock	$ 0	0	0	0
Retirement of restricted stock (in shares)	(35,000)
Net income (loss)	$ 0	0	(174,539)	(174,539)
Balance at Sep. 30, 2017	$ 54,243,816	14,608,145	(34,795,117)	34,056,844
Balance (in shares) at Sep. 30, 2017	21,594,685
Balance at Jun. 30, 2017	$ 54,243,816	14,489,042	(34,620,578)	34,112,280
Balance (in shares) at Jun. 30, 2017	21,629,685
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				(69,104)
Balance at Mar. 31, 2018	$ 54,243,816	14,923,996	(34,689,682)	34,478,130
Balance (in shares) at Mar. 31, 2018	21,575,673
Balance at Sep. 30, 2017	$ 54,243,816	14,608,145	(34,795,117)	34,056,844
Balance (in shares) at Sep. 30, 2017	21,594,685
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	118,293	0	118,293
Retirement of restricted stock	$ 0	0	0	0
Retirement of restricted stock (in shares)	(14,583)
Net income (loss)	$ 0	0	683,489	683,489
Balance at Dec. 31, 2017	$ 54,243,816	14,726,438	(34,111,628)	34,858,626
Balance (in shares) at Dec. 31, 2017	21,580,102
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	197,558	0	197,558
Retirement of restricted stock	$ 0	0	0	0
Retirement of restricted stock (in shares)	(4,429)
Net income (loss)	$ 0	0	(578,054)	(578,054)
Balance at Mar. 31, 2018	$ 54,243,816	14,923,996	(34,689,682)	34,478,130
Balance (in shares) at Mar. 31, 2018	21,575,673
Balance at Jun. 30, 2018	$ 54,243,816	14,962,071	(35,387,454)	33,818,433
Balance (in shares) at Jun. 30, 2018	21,705,173
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	71,176	0	71,176
Retirement of restricted stock	$ 0	0	0	0
Retirement of restricted stock (in shares)	(109,604)
Stock option exercises	$ 3,480	(1,229)	0	2,251
Stock option exercises (in shares)	2,500
Net income (loss)	$ 0	0	109,903	109,903
Balance at Sep. 30, 2018	$ 54,247,296	15,032,018	(35,277,551)	34,001,763
Balance (in shares) at Sep. 30, 2018	21,598,069
Balance at Jun. 30, 2018	$ 54,243,816	14,962,071	(35,387,454)	33,818,433
Balance (in shares) at Jun. 30, 2018	21,705,173
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				2,113,553
Balance at Mar. 31, 2019	$ 54,247,296	15,330,495	(33,273,901)	36,303,890
Balance (in shares) at Mar. 31, 2019	21,727,569
Balance at Sep. 30, 2018	$ 54,247,296	15,032,018	(35,277,551)	34,001,763
Balance (in shares) at Sep. 30, 2018	21,598,069
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	171,906	0	171,906
Net income (loss)	0	0	1,189,566	1,189,566
Balance at Dec. 31, 2018	$ 54,247,296	15,203,924	(34,087,985)	35,363,235
Balance (in shares) at Dec. 31, 2018	21,598,069
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	126,571	0	126,571
Issuance of restricted stock	$ 0	0	0	0
Issuance of restricted stock (in shares)	129,500
Net income (loss)	$ 0	0	814,084	814,084
Balance at Mar. 31, 2019	$ 54,247,296	$ 15,330,495	$ (33,273,901)	$ 36,303,890
Balance (in shares) at Mar. 31, 2019	21,727,569