Stock Options (Stock Option Activity) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Stock Options [Abstract]
Shares under option, number of shares (in shares)	1,748,000	2,721,875
Granted, number of shares (in shares)		615,000
Exercised, number of shares (in shares)	(539,089)	(1,203,875)
Expired, number of shares (in shares)		(385,000)
Forfeited, number of shares (in shares)	(150,000)
Shares under option, number of shares (in shares)	1,058,911	1,748,000	2,721,875
Exercisable, number of shares (in shares)	264,577	288,000
Shares under option, stock options price range, lower limit (in dollars per share)	$ 1.73	$ 1.77
Shares under option, stock options price range, upper limit (in dollars per share)	6.00	6.00
Granted, stock options price range, lower limit (in dollars per share)		1.73
Granted, stock options price range, upper limit (in dollars per share)		2.11
Exercised, stock options price range, lower limit (in dollars per share)	1.73	1.77
Exercised, stock options price range, upper limit (in dollars per share)	6.00	6.00
Expired, stock options price range, lower limit (in dollars per share)		1.77
Expired, stock options price range, upper limit (in dollars per share)		5.24
Forfeited, stock options price range, lower limit (in dollars per share)	1.73
Forfeited, stock options price range, upper limit (in dollars per share)	2.65
Shares under option, stock options price range, lower limit (in dollars per share)	1.73	1.73	$ 1.77
Shares under option, stock options price range, upper limit (in dollars per share)	2.92	6.00	6.00
Exercisable, stock options price range, lower limit (in dollars per share)	1.73	1.73
Exercisable, stock options price range, upper limit (in dollars per share)	2.92	6.00
Shares under option, weighted average exercise price (in dollars per share)	2.29	2.73
Granted, weighted average exercise price (in dollars per share)		1.84
Exercised, weighted average exercise price (in dollars per share)	2.58	2.75
Expired, weighted average exercise price (in dollars per share)		3.24
Forfeited, weighted average exercise price (in dollars per share)	2.00
Shares under option, weighted average exercise price (in dollars per share)	2.18	2.29	$ 2.73
Exercisable, weighted average exercise price (in dollars per share)	$ 2.45	$ 3.19
Shares under option, weighted average remaining contractual life (Year)	3 years 8 months 19 days	4 years 10 months 9 days	4 years 9 months 25 days
Exercisable, weighted average remaining contractual life (Year)	2 years 21 days	2 years 9 months 21 days
Shares under option, aggregate intrinsic value of in-the-money options	$ 5,055,797	$ 36,594,280
Exercisable, aggregate intrinsic value of in-the-money options	$ 1,180,591	$ 5,767,425