Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
Mar. 31, 2019
Jun. 30, 2018
Jun. 30, 2017
Statement of Financial Position [Abstract]      
Accounts receivable, allowance $ 373,329 $ 610,061 $ 571,511
Preferred stock, par value $ 0.01 $ 0.01 $ 0.01
Preferred stock, shares authorized 500,000 500,000 500,000
Common stock, par value $ 0.01 $ 0.01 $ 0.01
Common stock, shares authorized 14,500,000 14,500,000 14,500,000
Common stock, shares issued 11,879,056 11,708,469 11,225,385
Common stock, shares outstanding 11,673,203 11,502,616 11,190,606
Treasury stock, shares 205,853 205,853 34,779