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Related Party Transactions
 3 Months Ended
Mar. 31, 2024
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
There have been no changes in related party relationships during the three months ended March 31, 2024. For information on our related party transactions, see Part II, Item 8, Note 12 — Related Party Transactions in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023.
Our operations include the following related party transactions (in thousands):
 Three Months Ended
March 31,
 20242023
Total revenue from related parties1
$122,168 $833 
Cost of product revenue2
20 — 
General and administrative expenses3
203 — 
Interest expense4
52 — 
Other expense, net5
(491)— 
1 Includes revenue from SK ecoplant for the three months ended March 31, 2024, which became a related party on September 23, 2023, however we had transactions with SK ecoplant in prior periods (see Note 15 — SK ecoplant Strategic Investment). Revenue from related parties for the three months ended March 31, 2023 relate to Korean JV in its entirety.
2 Includes expenses billed by SK ecoplant to Korean JV for headcount support services.
3 Includes rent expenses per operating lease agreements entered between Korean JV and SK ecoplant and miscellaneous expenses billed by SK ecoplant to Korean JV.
4 Interest expense per two term loans entered between Korean JV and SK ecoplant in fiscal year 2023.    
5 Other expense, net is represented by realized foreign gain for the three months ended March 31, 2024.
Below is the summary of outstanding related party balances as of March 31, 2024 and December 31, 2023 (in thousands):
 March 31,December 31,
20242023
   
Accounts receivable$292,356 $262,031 
Contract assets
3,531 6,872 
Deferred cost of revenue, current
— 875 
Prepaid expenses and other current assets
2,180 2,257 
Operating lease right-of-use assets1
1,853 2,031 
Other long-term assets
8,270 9,069 
Accounts payable— 77 
Accrued expenses and other current liabilities6,095 3,427 
Deferred revenue and customer deposits, current
5,678 1,707 
Operating lease liabilities, current1
439 440 
Deferred revenue and customer deposits, non-current
3,544 6,709 
Operating lease liabilities, non-current1
1,442 1,617 
Non-recourse debt2
4,458 4,627 
1 Balances relate to operating leases entered between Korean JV and SK ecoplant.
2 Represent the total balance of two term loans entered between Korean JV and SK ecoplant in fiscal year 2023.