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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash Flows from Operating Activities:    
Net cash used in operating activities $ (2,490) $ (2,660)
Cash Flows from Investing Activities:    
Proceeds from sales of ownership interests 2,300 6,534
Acquisitions of ownership interests (3,000) 0
Advances and loans to ownership interests (250) (5,045)
Purchases of marketable securities (8,530) (5,952)
Proceeds from maturities in marketable securities 14,650 0
Net cash (used in) provided by investing activities 5,170 (4,463)
Cash Flows from Financing Activities:    
Repurchases of Company common stock (75) (2,060)
Tax withholdings related to equity-based awards (276) (523)
Net cash used in financing activities (351) (2,583)
Net change in cash, cash equivalents and restricted cash 2,329 (9,706)
Cash, cash equivalents and restricted cash at beginning of period 13,356 24,764
Cash, cash equivalents and restricted cash at end of period $ 15,685 $ 15,058