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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
Segment
Dec. 31, 2020
USD ($)
Summary Of Significant Accounting Policies [Line Items]    
Number of operating segments | Segment 2  
Number of reporting segment | Segment 1  
Revenue recognized $ 158,000 $ 0
Allowance for doubtful accounts 32,000 0
Impairment of long-lived assets $ 0 0
Capitalized costs, amortization method straight-line method  
Capitalized costs, amortization period 3 years  
Advertising expenses $ 2,459,000 437,000
Vesting period 4 years  
Stock option grants, term 10 years  
Open tax year 2017 2018 2019  
Uncertain tax positions $ 0 0
Australia    
Summary Of Significant Accounting Policies [Line Items]    
Revenue recognized $ 78,000  
ASU No. 2018-15    
Summary Of Significant Accounting Policies [Line Items]    
Change in accounting principle, accounting standards update, adopted true  
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2021  
Change in accounting principle, accounting standards update, immaterial effect true  
ASU 2020-06    
Summary Of Significant Accounting Policies [Line Items]    
Change in accounting principle, accounting standards update, adopted true  
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2021  
Change in accounting principle, accounting standards update, immaterial effect true  
ASU 2019-12    
Summary Of Significant Accounting Policies [Line Items]    
Change in accounting principle, accounting standards update, adopted true  
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2021  
Change in accounting principle, accounting standards update, early adoption false  
Software Development Costs    
Summary Of Significant Accounting Policies [Line Items]    
Capitalized internal-use software development costs $ 0 $ 0