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14. ACCRUED WARRANTY (Tables)
3 Months Ended
Mar. 31, 2020
Less: Accumulated Amortization  
Warranty reserve activity
   

March 31, 2020

(Unaudited)

    December 31, 2019  
Beginning accrued warranty costs   $ 30,000     $ 30,000  
Provision for warranty expense     31,864       2,609  
Settlement of warranty claims     (1,864 )     (2,609 )
Ending accrued warranty costs   $ 60,000     $ 30,000