Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts receivable, allowance for credit losses	$ 3,326	$ 410
Securities owned, amounts pledged	266,428	440,531
Net accumulated depreciation	92,785	90,958
Right-of-use lease assets, accumulated amortization	76,462	50,336
Unamortized debt issuance expense	926	1,154
Deferred Income Tax Liabilities, Net
Net deferred tax assets	$ 54,957	$ 44,104
Class A Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	12,447,036	12,381,778
Common stock, outstanding (in shares)	12,447,036	12,381,778
Class B Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	99,665	99,665
Common stock, issued (in shares)	99,665	99,665
Common stock, outstanding (in shares)	99,665	99,665