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CONDENSED FINANCIAL INFORMATION - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 09, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |
Net loss |  | $ (275,000) | $ (1,353,000) | $ (662,000)
Adjustments to reconcile net loss to cash, cash equivalents, and restricted cash provided by (used in) operating activities: |  |  |  |
Depreciation and amortization |  | 65,000 | 83,000 | 47,000
Warrant fair value adjustment |  | 0 | 0 | (12,000)
Gain on early extinguishment of debt |  | (225,000) | 0 | 0
Interest payable |  | (10,000) | 2,000 | 4,000
Other assets |  | (19,000) | 37,000 | (52,000)
Net cash provided by (used in) operating activities |  | 2,344,000 | 730,000 | (5,794,000)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |  |
Purchase of intangible assets |  | 0 | 0 | (1,000)
Capital returns from non-marketable equity securities |  | 0 | 3,000 | 0
Net cash provided by (used in) investing activities |  | 44,000 | 234,000 | (476,000)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |  |
Proceeds from issuance of convertible senior notes, net of issuance costs |  | 0 | 0 | 953,000
Repurchase of convertible senior notes |  | (362,000) | 0 | 0
Purchase of capped calls related to convertible senior notes |  | 0 | 0 | (119,000)
Proceeds from exercise of stock options |  | 3,000 | 4,000 | 15,000
Proceeds from issuance of common stock for ESPP |  | 2,000 | 2,000 | 0
Proceeds from warrant exercise | $ 22,000 | 0 | 0 | 22,000
Proceeds from the February 2021 Offering |  | 0 | 0 | 886,000
Net cash (used in) provided by financing activities |  | (2,639,000) | (1,751,000) | 7,342,000
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH |  | (251,000) | (787,000) | 1,072,000
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – Beginning of year |  | 1,791,000 | 2,578,000 | 1,506,000
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – End of year |  | 1,540,000 | 1,791,000 | 2,578,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION – Cash paid during the period for interest |  | 203,000 | 355,000 | 122,000
DISCLOSURES OF NONCASH FINANCING ACTIVITIES: |  |  |  |
Issuance of common stock in extinguishment of warrant liabilities |  | 0 | 0 | (35,000)
Parent Company |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |
Net loss |  | (275,000) | (1,353,000) | (662,000)
Adjustments to reconcile net loss to cash, cash equivalents, and restricted cash provided by (used in) operating activities: |  |  |  |
Earnings of subsidiaries |  | 487,000 | 1,338,000 | 665,000
Depreciation and amortization |  | 3,000 | 7,000 | 2,000
Warrant fair value adjustment |  | 0 | 0 | (12,000)
Interest payable |  | (1,000) | 0 | 1,000
Other assets |  | 2,000 | (2,000) | 0
Net cash provided by (used in) operating activities |  | (9,000) | (10,000) | (6,000)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |  |
Purchase of intangible assets |  | 0 | 0 | (1,000)
Payments to Acquire Interest in Subsidiaries and Affiliates |  | (4,000) | (6,000) | (1,860,000)
Capital returns from non-marketable equity securities |  | 370,000 | 10,000 | 139,000
Net cash provided by (used in) investing activities |  | 366,000 | 4,000 | (1,722,000)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |  |
Proceeds from issuance of convertible senior notes, net of issuance costs |  | 0 | 0 | 953,000
Purchase of capped calls related to convertible senior notes |  | 0 | 0 | (119,000)
Proceeds from exercise of stock options |  | 3,000 | 4,000 | 15,000
Proceeds from issuance of common stock for ESPP |  | 2,000 | 2,000 | 0
Proceeds from warrant exercise |  | 0 | 0 | 22,000
Proceeds from the February 2021 Offering |  | 0 | 0 | 886,000
Issuance cost of common stock |  | 0 | 0 | (29,000)
Net cash (used in) provided by financing activities |  | (357,000) | 6,000 | 1,728,000
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH |  | 0 | 0 | 0
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – Beginning of year |  | 0 | 0 |
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – End of year |  | 0 | 0 | 0
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION – Cash paid during the period for interest |  | 3,000 | 2,000 | 0
DISCLOSURES OF NONCASH FINANCING ACTIVITIES: |  |  |  |
Recognition of warrant liability |  | 0 | 0 | 0
Issuance of common stock in extinguishment of warrant liabilities |  | $ 0 | $ 0 | $ (35,000)

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