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Organization and Summary of Significant Accounting Policies (Details 2) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Reconciliation of the product warranty liability    
Balance at beginning of the period $ 175,000 $ 175,000
Payments (259,937) (364,163)
Provision for warranties 259,937 364,163
Balance at end of the period $ 175,000 $ 175,000