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Organization And Summary Of Significant Accounting Policies (Components Of Accounts Payable) (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Organization And Summary Of Significant Accounting Policies Components Of Accounts Payable      
Accounts payable $ 588,150 $ 221,568  
Accrued warranty reserve 183,903 212,495 $ 328,279
Accrued compensation, benefits, commissions and marketing expenses 143,397 27,383  
Total accrued liabilities 327,300 239,878  
Total $ 915,450 $ 461,446