Additional Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2021

Supplemental Cash Flow Information [Abstract]

Schedule of Net Changes in Components of Operating Assets and Liabilities

The following table provides information regarding the net changes in working capital (in thousands):

	Three Months Ended March 31,
	2021		2020
Accounts receivable	$	916	$	1,811
Prepaid expenses and other current assets	5		2,262
Accounts payable	1,674		3,280
Accounts payable due to related parties	(460)		—
Accrued liabilities	7,669		2,500
Other, net	(512)		(662)
Net changes in working capital	$	9,292	$	9,191

Schedule of Supplemental Disclosure of Cash Flow Information

The following table provides supplemental disclosure of cash flow information (in thousands):

	Three Months Ended March 31,
	2021		2020
Non-cash accruals of property, plant and equipment and other non-current assets	$	(356)	$	2,174
Non-cash settlement of withholding taxes associated with the 2019 bonus and vesting of certain awards	2,305		—
Non-cash settlement of the 2019 bonus	3,258		—
Non-cash settlement of Final Payment Fee	—		8,539
Tradable equity securities	—		2,362

    The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of such amounts shown in the Condensed Consolidated Statements of Cash Flows (in thousands):

	Three Months Ended March 31,
	2021		2020
Cash and cash equivalents	$	58,729	$	55,452
Non-current restricted cash	3,443		3,570
Total cash, cash equivalents and restricted cash shown in the statements of cash flows	$	62,172	$	59,022