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Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2019
Jun. 30, 2018
Statement of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 18,226,000 18,137,000
Common stock, shares outstanding 18,207,000 18,126,000
Treasury stock, shares held 19,000 11,000