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Financial Statements Details
 6 Months Ended
Jun. 30, 2022
Balance Sheet Components [Abstract]  
Financial Statements Details Financial Statements Details
Cash, Cash Equivalents and Restricted Cash
    The reconciliation of cash, cash equivalents and restricted cash reported on the unaudited condensed consolidated balance sheets to the total of the same such amounts in the unaudited condensed consolidated statements of cash flows is as follows (in thousands):
June 30, 2022December 31, 2021
Cash and cash equivalents$493,246 $620,813 
Restricted cash included in other assets4,258 4,237 
 Total cash, cash equivalents and restricted cash$497,504 $625,050 
Accounts Receivable, net
    Accounts receivable, net consists of the following (in thousands):
June 30, 2022December 31, 2021
Accounts receivable $598,380 $521,597 
Allowance for doubtful accounts (207)(132)
Product sales rebate and returns reserve(12,387)(4,956)
   Accounts receivable, net $585,786 $516,509 
Inventories
    Inventories consist of the following (in thousands):
June 30, 2022December 31, 2021
Raw materials $462,396 $316,737 
Finished goods 390,414 333,380 
   Total inventories $852,810 $650,117 
Prepaid Expenses and Other Current Assets
    Prepaid expenses and other current assets consist of the following (in thousands):
June 30, 2022December 31, 2021
Inventory deposits$98,099 $46,311 
Prepaid income taxes10,189 8,977 
Other current assets256,102 163,916 
Other prepaid expenses and deposits24,307 18,531 
   Total prepaid expenses and other current assets$388,697 $237,735 
Property and Equipment, net
    Property and equipment, net consists of the following (in thousands):
June 30, 2022December 31, 2021
Land$40,485 $40,145 
Equipment and machinery 111,646 90,915 
Computer hardware and software 47,376 44,083 
Leasehold improvements
30,208 30,502 
Furniture and fixtures 3,612 3,634 
Construction-in-process 2,207 2,378 
    Property and equipment, gross 235,534 211,657 
Less: accumulated depreciation (143,711)(133,023)
    Property and equipment, net $91,823 $78,634 
    Depreciation expense was $6.2 million and $4.8 million for the three months ended June 30, 2022 and 2021, respectively, and $11.8 million and $9.7 million for the six months ended June 30, 2022 and 2021, respectively.
Accrued Liabilities
    Accrued liabilities consist of the following (in thousands):
June 30, 2022December 31, 2021
Accrued payroll related costs$78,066 $99,571 
Accrued manufacturing costs79,949 80,213 
Accrued product development costs24,311 22,188 
Accrued warranty costs13,288 10,414 
Other14,720 14,257 
   Total accrued liabilities $210,334 $226,643 
Warranty Accrual
    The following table summarizes the activity related to our accrued liability for estimated future warranty costs (in thousands):
Six Months Ended June 30,
20222021
Warranty accrual, beginning of period$10,414 $9,314 
Liabilities accrued for warranties issued during the period 8,441 5,603 
Warranty costs incurred during the period(5,567)(5,922)
Warranty accrual, end of period$13,288 $8,995 
Contract Assets
    The following table summarizes the beginning and ending balances of our contract assets included in "Prepaid and other current assets" on the condensed consolidated balance sheets (in thousands):
Six Months Ended June 30,
2022
Contract assets, beginning balance$24,388 
Contract assets, ending balance29,237 
Contract Liabilities, Deferred Revenue and Other Performance Obligations    
Contract Liabilities
    A contract liability is recognized when we have received customer payments in advance of our satisfaction of a performance obligation under a cancellable contract. The following table summarizes the activity related to our contract liabilities (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Contract liabilities, beginning balance$98,422 $80,465 $93,382 $85,957 
Less: Revenue recognized from beginning balance(8,589)(8,482)(19,076)(18,482)
Less: Beginning balance reclassified to deferred revenue(4,338)(3,856)(3,606)(12,710)
Add: Contract liabilities recognized16,105 15,227 30,900 28,589 
Contract liabilities, ending balance$101,600 $83,354 $101,600 $83,354 
    As of June 30, 2022 and December 31, 2021, $41.4 million and $38.7 million of our contract liabilities, respectively, were included in "Other current liabilities" with the remaining balances included in "Other long-term liabilities" on the condensed consolidated balance sheets.
Deferred Revenue
    Deferred revenue is comprised mainly of unearned revenue related to multi-year post-contract support ("PCS") contracts, services and product deferrals related to acceptance clauses. The following table summarizes the activity related to our deferred revenue (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Deferred revenue, beginning balance
$1,123,746 $720,031 $929,312 $650,827 
Less: Revenue recognized from beginning balance(309,594)(145,556)(322,954)(222,865)
Add: Deferral of revenue in current period, excluding amounts recognized during the period219,338 171,615 427,132 318,128 
Deferred revenue, ending balance$1,033,490 $746,090 $1,033,490 $746,090 
Other Performance Obligations
    Other performance obligations include unbilled contract revenue for services and products that will be recognized in future periods. As of June 30, 2022, other performance obligations of $178.1 million were comprised mainly of unbilled multi-year PCS contract amounts that will be recognized as revenue in future periods. In addition, as of June 30, 2022 the company had entered into $762.7 million of binding contractual agreements with certain customers that are primarily related to future product shipments.
Revenue from Total Remaining Performance Obligations
    Revenue from total remaining performance obligations represents contract liabilities, deferred revenue and unbilled contract revenue that will be recognized in future periods. As of June 30, 2022, approximately $1,313.3 million of revenue is expected to be recognized from remaining performance obligations, of which approximately 83% is expected to be recognized over the next two years and approximately 17% is expected to be recognized during the third to the fifth year. These amounts do not include the $762.7 million of binding contractual agreements related primarily to future product shipments outlined above. As of June 30, 2022, it is expected that the majority of the amounts allocated to these specific performance obligations will be recognized as revenue upon product shipment over the next two years; however, given the current uncertain supply chain environment and industry wide supply constraints, we may experience manufacturing and shipment delays or cancellations related to these performance obligations, which could impact revenue recognition.
Other Income (Expense), net
    Other income (expense), net consists of the following (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Interest income$4,427 $1,872 $6,855 $3,917 
Unrealized gain (loss) on equity investments(5,084)— 23,413 — 
Other income (expense), net124 (153)679 (623)
    Total$(533)$1,719 $30,947 $3,294