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Referral Fees (Details) - USD ($)	3 Months Ended		6 Months Ended
Referral Fees (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Referral Fees
Referral fees	$ 353,000	$ 162,000	$ 760,000	$ 273,000