v3.26.3
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Concentration Risk [Line Items]          
Advertising costs $ 28,000,000.0 $ 25,500,000 $ 84,400,000 $ 62,700,000  
Number of reportable segments | segment     1    
Number of operating segments | segment     1    
Impairment of capitalized software 1,600,000 0 $ 2,134,000 0  
Allowance for credit losses 0   0   $ 0
Accounts payable 13,740,000   13,740,000   7,998,000
Board of Directors Chairman          
Concentration Risk [Line Items]          
Vendor expenses 200,000 $ 200,000 600,000 $ 500,000  
Accounts payable $ 0   $ 0   $ 800,000
Apple | Accounts Receivable | Customer Concentration Risk          
Concentration Risk [Line Items]          
Concentration risk (in percent)     69.90%   62.50%
Google | Accounts Receivable | Customer Concentration Risk          
Concentration Risk [Line Items]          
Concentration risk (in percent)     13.90%   22.70%
Stripe | Accounts Receivable | Customer Concentration Risk          
Concentration Risk [Line Items]          
Concentration risk (in percent)         11.40%