Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities:
Net income (loss)	$ (37,615)	$ 54,561
Adjustments to reconcile to net cash used in operating activities:
Depreciation	0	808
Amortization of debt discount	0	3,454
Amortization of right of use asset	311	260
Equity (income) loss, net	9,420	(67,232)
Impairments of ownership interests and advances	20,039	3,012
Income from change in fair value of derivative	0	(5,060)
Gain from observable price changes	(1,224)	(4,526)
Other, net	175	(2,315)
Stock-based compensation, including liability classified awards	965	1,237
Changes in assets and liabilities:
Prepaid expenses and other current assets	(137)	(823)
Accounts payable, accrued expenses, and other current liabilities	(77)	(3,346)
Net cash used in operating activities	(8,143)	(19,970)
Cash Flows from Investing Activities:
Acquisitions of ownership interests	(7,534)	(11,640)
Proceeds from sales and distributions from ownership interests	7,903	104,302
Advances and loans to ownership interests	(1,638)	(5,055)
Repayment of advances and loans from ownership interests	0	750
Purchase of marketable securities	0	(57,243)
Proceeds, from sales and maturities in marketable securities	0	95,189
Net cash (used in) provided by investing activities	(1,269)	126,303
Cash Flows from Financing Activities:
Payment of dividend	0	(20,679)
Repayments on credit facility	0	(68,568)
Tax withholdings related to equity-based awards	(40)	(236)
Net cash used in financing activities	(40)	(89,483)
Net change in cash, cash equivalents and restricted cash	(9,452)	16,850
Cash, cash equivalents and restricted cash equivalents at beginning of period	25,053	8,203
Cash, cash equivalents and restricted cash at end of period	$ 15,601	$ 25,053