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Revenue Recognition (Tables)
3 Months Ended
Sep. 30, 2019
Revenue from Contract with Customer [Abstract]  
Schedule product revenues by geographic location

 

    Three Months Ended  
    September 30,  
    2019     2018  
U.S.   1,262,000     $ 1,273,000  
International     178,000       159,000  
Total net revenue   1,440,000     $ 1,432,000