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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Summary Of Significant Accounting Policies      
Deferred revenue recognized to revenue $ 2,860,000    
Deferred revenue recognized through the period (as a percent)     40.00%
Amortization of Deferred Sales Commissions 36,000 $ 47,000  
Allowance for doubtful accounts 191,000   $ 157,000
Bad debt expense 34,000 $ 9,000  
Stock Options      
Summary Of Significant Accounting Policies      
Outstanding unamortized share-based compensation expense 684,000    
Restricted Stock Units      
Summary Of Significant Accounting Policies      
Outstanding unamortized share-based compensation expense $ 6,879,000    
Maximum      
Summary Of Significant Accounting Policies      
Service period 3 years    
Minimum      
Summary Of Significant Accounting Policies      
Service period 1 year    
Major Customer Number One [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]      
Summary Of Significant Accounting Policies      
Concentration Risk, Percentage 18.00% 20.00%  
Major Customer Number One [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]      
Summary Of Significant Accounting Policies      
Concentration Risk, Percentage 15.00%   21.00%
Major Customer Number Two [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]      
Summary Of Significant Accounting Policies      
Concentration Risk, Percentage   10.00%  
Major Customer Number Two [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]      
Summary Of Significant Accounting Policies      
Concentration Risk, Percentage     15.00%
Major Customer Number Three [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]      
Summary Of Significant Accounting Policies      
Concentration Risk, Percentage     10.00%