Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
item
Dec. 31, 2018
USD ($)
Significant Accounting Policies [Line Items]      
Term of annual contract 1 year    
Revenue, Remaining Performance Obligation, Optional Exemption, Performance Obligation [true false] true    
Deferred revenue recognized $ 3,000 $ 2,200  
Deferred revenue 3,004 2,230  
Deferred cost of sales 500 300  
Commission expense 600 400  
Allowance for doubtful accounts 500 200  
Bad debt expense $ 377 $ 199  
Number of clients representing 10% or more of the company's total revenue | item 0 0  
Warranty reserve $ 1,553 $ 1,491 $ 116
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