Stock Based Compensation - Summary of stock option plan activity under employee plans and the directors plans (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Stock Based Compensation
Beginning Balance, Shares	45,000	45,000	45,000
Options Granted, Shares	7,500	3,000	3,000
Options Exercised, Shares	0	0	0
Options Forfeited or Expired, Shares	(9,750)	(3,000)	(3,000)
Ending Balance, Shares	42,750	45,000	45,000
Exercisable, Shares	35,250
Beginning Balance, Weighted Average Exercise Price	$ 5.52	$ 5.92	$ 6.67
Options Granted, Weighted Average Exercise Price	1.20	2.13	2.22
Options Exercised, Weighted Average Exercise Price	0.00	0.00	0.00
Options Forfeited or Expired, Weighted Average Exercise Price	6.00	8.10	13.46
Ending Balance, Weighted Average Exercise Price	4.65	$ 5.52	$ 5.92
Exercisable, Weighted Average Exercise Price	$ 5.38
Options, Weighted Average Remaining Contractual Terms (years)	4 years 1 month 6 days	4 years	4 years 3 months 18 days
Exercisable, Weighted Average Remaining Contractual Terms (years)	3 years
Options, Aggregate Intrinsic Value	$ 304,768	$ 0	$ 0
Exercisable, Aggregate Intrinsic Value	$ 225,443