Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income/(loss)	$ 32,777	$ (21,888)
Adjustments to reconcile net income/(loss) to net cash (used in)/provided by operating activities:
Advisory fees received in gold, other precious metals and cryptocurrencies	(39,341)	(29,135)
Contractual gold payments	8,584	7,823
Stock-based compensation	5,264	6,159
(Gain/)/loss on revaluation of deferred consideration – gold payments	(3,329)	25,566
Deferred income taxes	3,367	832
Amortization of right of use asset	1,340	1,588
Amortization of issuance costs – convertible notes	899	115
Depreciation and amortization	508	507
Impairments	303	19,672
Gain on sale – Canadian ETF business		(2,877)
Loss on extinguishment of debt		2,387
Amortization of issuance costs – former credit facility		1,328
Other	(372)	(83)
Changes in operating assets and liabilities:
Securities owned, at fair value	(23,911)	4,209
Accounts receivable	(2,622)	4,461
Prepaid expenses	(2,497)	(2,016)
Gold, other precious metals and cryptocurrencies	27,959	20,882
Other assets	(202)	(702)
Fund management and administration payable	(896)	1,677
Compensation and benefits payable	(7,396)	(18,431)
Income taxes receivable/payable	(1,852)	(1,046)
Securities sold, but not yet purchased, at fair value		(582)
Operating lease liabilities	(1,658)	(1,845)
Accounts payable and other liabilities	858	781
Net cash (used in)/provided by operating activities	(2,217)	19,382
Cash flows from investing activities:
Purchase of investments	(5,750)
Purchase of fixed assets	(173)	(224)
Proceeds from held-to-maturity securities maturing or called prior to maturity	77	16,365
Proceeds from the sale of the Company's financial interests in AdvisorEngine Inc.		8,155
Proceeds from sale of Canadian ETF business, net		2,774
Net cash (used in)/provided by investing activities	(5,846)	27,070
Cash flows from financing activities:
Shares repurchased	(34,506)	(26,444)
Dividends paid	(9,865)	(10,270)
Convertible notes issuance costs	(4,297)	(4,611)
Repayment of debt		(179,000)
Proceeds from the issuance of convertible notes	150,000	150,000
Proceeds from exercise of stock options	815	240
Net cash provided by/(used in) financing activities	102,147	(70,085)
Increase/(decrease) in cash flow due to changes in foreign exchange rate	126	(1,084)
Increase/(decrease) in cash and cash equivalents	94,210	(24,717)
Cash and cash equivalents—beginning of year	73,425	74,972
Cash and cash equivalents—end of period	167,635	50,255
Supplemental disclosure of cash flow information:
Cash paid for taxes	5,846	2,200
Cash paid for interest	$ 3,719	$ 3,390