Summary of Significant Accounting Policies - Summary of information is necessary to calculate earnings per share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Summary of Significant Accounting Policies
Net loss, as reported	$ (539,000)	$ (330,000)	$ (1,531,000)	$ (614,000)	$ (474,000)	$ 378,000	$ (779,000)	$ (1,235,000)	$ (3,014,100)	$ (2,109,685)	$ (2,192,170)
Weighted average common shares outstanding									4,013,537	4,013,537	4,013,537
Effect of dilutive stock options									0	0	0
Weighted average diluted common shares outstanding									4,013,537	4,013,537	4,013,537
Net loss per common share
Basic (in dollars per share)	$ (0.14)	$ (0.08)	$ (0.38)	$ (0.15)	$ (0.12)	$ 0.09	$ (0.19)	$ (0.31)	$ (0.75)	$ (0.53)	$ (0.55)
Diluted (in dollars per share)	$ (0.14)	$ (0.08)	$ (0.38)	$ (0.15)	$ (0.12)	$ 0.09	$ (0.19)	$ (0.31)	$ (0.75)	$ (0.53)	$ (0.55)
Employee stock options excluded from computation of diluted income per share amounts because their effect would be anti-dilutive									0	0	0