Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2018	Jun. 30, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 2,635,206	$ 1,682,228
Other receivables, allowance for doubtful accounts	$ 145,231	$ 145,176
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, par value
Preferred stock, shares issued
Common stock, shares authorized	50,000,000	50,000,000
Common stock, par value
Common stock, shares issued	13,751,032	13,271,032
Common stock, shares outstanding	13,575,535	13,095,535
Treasury stock, shares	175,497	175,497