Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Accounts Receivable (Details)

v3.21.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Accounts Receivable (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Customer
Dec. 31, 2020
USD ($)
Customer
Accounts Receivable [Abstract]    
Accounts receivable, allowances for contractual credits and doubtful accounts | $ $ 0.2 $ 0.1
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Six Customers [Member]    
Accounts Receivable [Abstract]    
Number of customers 6  
Percentage of account receivables 94.00%  
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]    
Accounts Receivable [Abstract]    
Number of customers   3
Percentage of account receivables   92.00%