CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Allowance for expected credit losses	$ 8,638	$ 9,223
Debt securities, available-for-sale, amortized cost	$ 0	$ 40,000
Convertible Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible Preferred stock, shares authorized	1,000,000	1,000,000
Convertible Preferred stock, shares outstanding	0	0
Common Stock Class A
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	9,853,672	9,854,682
Common stock, shares outstanding	9,853,672	9,854,682
Common Stock Class B
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	2,861,843	2,861,843
Common stock, shares outstanding	2,861,843	2,861,843
Common Stock Class C
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	2,045,016	2,045,016
Common stock, shares outstanding	2,045,016	2,045,016
Common Stock Class D
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	34,116,485	33,618,227
Common stock, shares outstanding	34,116,485	33,618,227