Registration of securities issued in business combination transactions

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.21.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
customer
Dec. 31, 2019
USD ($)
customer
Dec. 31, 2018
USD ($)
Significant Accounting Policies [Line Items]          
Term of annual contract 1 year   1 year    
Revenue, Remaining Performance Obligation, Optional Exemption, Performance Obligation [true false] true   true    
Deferred revenue recognized     $ 3,000 $ 2,200  
Deferred revenue $ 4,814   3,004 2,230  
Deferred cost of sales     500 300  
Commission expense     600 400  
Allowance for doubtful accounts     500 200  
Bad debt expense $ 164 $ 285 377 199  
Warranty reserve     $ 1,553 $ 1,491 $ 116
Accounts receivables          
Significant Accounting Policies [Line Items]          
Number of customers | customer     0 0  
Revenue          
Significant Accounting Policies [Line Items]          
Number of customers | customer     0 0  
Customer Concentration Risk [Member] | Accounts receivables | Customer          
Significant Accounting Policies [Line Items]          
Concentration of credit risk, percentage     10.00% 10.00%  
Customer Concentration Risk [Member] | Revenue | Customer          
Significant Accounting Policies [Line Items]          
Concentration of credit risk, percentage     10.00% 10.00%  
Sales and marketing expense          
Significant Accounting Policies [Line Items]          
Advertising Expense     $ 40 $ 100  
Accrued expenses and other current liabilities          
Significant Accounting Policies [Line Items]          
Warranty reserve     1,600 $ 1,500  
Restricted Cash          
Significant Accounting Policies [Line Items]          
Security deposit     $ 600