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Revenue Recognition (Tables)
6 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Schedule of product revenues by geographic location
    Three Months Ended December 31,     Six Months Ended December 31,  
    2019     2018     2019     2018  
U.S.   $ 3,047,000     $ 1,730,000     $ 4,309,000       3,001,000  
International     128,000       65,000       306,000       226,000  
Total net revenue   $ 3,175,000     $ 1,795,000     $ 4,615,000       3,227,000