Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
reporting_unit
Sep. 30, 2021
USD ($)
segment
Jul. 09, 2021
Dec. 31, 2020
USD ($)
Sep. 30, 2020
Noncontrolling Interest [Line Items]          
Number of operating segments | segment   1      
Number of reportable segments | segment   1      
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Participation interest in loan pool 5.00% 5.00%      
Nonaccrual loans, threshold for impairment evaluation $ 50,000 $ 50,000      
Troubled debt restructuring receivables, threshold for impairment evaluation $ 50,000 50,000      
Number of reporting units | reporting_unit 1        
Goodwill impairment charges $ 0        
Funding commitments $ 20,987,000 $ 20,987,000   $ 18,386,000  
Sunlight Financial LLC          
Noncontrolling Interest [Line Items]          
Noncontrolling interest percent 34.90% 34.90% 34.90%    
Residential solar loans          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Participation interest in loan pool 5.00% 5.00%     5.00%