CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities:
Net cash used in operating activities	$ (13,613)	$ (11,407)
Cash Flows from Investing Activities:
Proceeds from sales of and distributions from companies	14,912	16,462
Acquisitions of ownership interests in companies	(250)	(8,026)
Advances and loans to companies	(7,949)	(13,564)
Repayment of advances and loans to companies	10,500	0
Decrease in marketable securities	3,771	10,268
Net cash provided by investing activities	20,984	5,140
Proceeds from credit facility	35,000	50,000
Payments of Debt Issuance Costs	(2,252)	(5,696)
Repayments of Convertible Debt	(41,000)	(11,796)
Cash Flows from Financing Activities:
Issuance of Company common stock, net	0	12
Tax withholdings related to equity-based awards	(200)	(130)
Net cash provided by (used in) financing activities	(8,452)	32,390
Net change in cash, cash equivalents and restricted cash equivalents	(1,081)	26,123
Cash, cash equivalents and restricted cash equivalents at beginning of period	27,087	28,394
Cash, cash equivalents and restricted cash equivalents at end of period	$ 26,006	$ 54,517