Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2019

Notes To Financial Statements [Abstract]

Schedule of Inventories

Inventories

Inventories consist of the following (in thousands): 

	June 30, 2019		December 31, 2018
Raw materials	$	37,094	$	26,119
Work in process	25,752		13,784
Finished goods	18,278		15,738
Total inventories	$	81,124	$	55,641

Schedule of Prepaid Expense and Other Assets

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands): 

	June 30, 2019		December 31, 2018
Tax related receivables	$	54,059	$	36,794
Current promissory note receivable 1	26,699		—
Other current receivables 2	18,826		6,511
Prepaid software and maintenance	16,682		5,938
Other prepaid expenses and current assets	18,968		23,227
Total prepaid expenses and other current assets	$	135,234	$	72,470

¹  Current portion of unsecured promissory note receivable (Refer to Note 5“Equity Method Investments” of the Notes to Condensed Consolidated Financial Statements for more information).

²  Includes $16.0 million receivable from litigation settlement (Refer to Note 9“Legal Proceedings” of the Notes to Condensed Consolidated Financial Statements for more information).

Schedule of Accrued Liabilities

Accrued Liabilities

Accrued liabilities consist of the following (in thousands): 

	June 30, 2019		December 31, 2018
Accrued payroll and benefits	$	111,831	$	127,109
Accrued expenses	52,791		39,323
Current operating lease liabilities	16,144		—
Accrued warranty	10,499		8,551
Accrued property, plant and equipment	9,969		8,193
Accrued sales return reserve	9,217		6,534
Accrued customer credits and deposits	8,796		12,439
Accrued sales tax and value added tax	6,864		6,276
Accrued professional fees	6,454		6,752
Accrued income taxes	4,407		5,752
Accrued sales rebate	4,210		5,668
Other accrued liabilities	4,452		8,082
Total accrued liabilities	$	245,634	$	234,679

Schedule of Warranty Accrual

Warranty

We regularly review the balance for accrued warranty and update based on historical warranty trends. Actual warranty costs incurred have not materially differed from those accrued; however, future actual warranty costs could differ from the estimated amounts.

Warranty accrual consists of the following activity (in thousands):

	Six Months Ended June 30,
	2019			2018
Balance at beginning of period	$	8,551		$	5,929
Charged to cost of net revenues	6,000			5,728
Actual warranty expenditures	(4,052		)	(4,371		)
Balance at end of period	$	10,499		$	7,286

Schedule of Deferred Revenues

Deferred Revenues

Deferred revenues consist of the following (in thousands):

	June 30, 2019		December 31, 2018
Deferred revenues - current	$	481,462	$	393,138
Deferred revenues - long-term 1	$	23,902	$	17,051

¹ Included in other long-term liabilities within our Condensed Consolidated Balance Sheet