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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
9 Months Ended
Sep. 30, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Allowance for doubtful accounts | $ $ 250,000 $ 250,000
Number of notes receivable | item 1  
Maximum original expected duration of cancelable service contracts 1 year