Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2020

Notes To Financial Statements [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands): 

	June 30, 2020		December 31, 2019
Raw materials	$	73,183	$	54,947
Work in process	32,232		30,974
Finished goods	25,861		26,130
Total inventories	$	131,276	$	112,051

Schedule of Prepaid Expense and Other Assets

	June 30, 2020		December 31, 2019
Tax related receivables	$	72,481	$	41,252
Prepaid software and maintenance	21,543		7,128
Current promissory note 1	21,314		25,005
Others	24,957		29,065
Total prepaid expenses and other current assets	$	140,295	$	102,450

¹Refer to Note 6“Equity Method Investments” of the Notes to Condensed Consolidated Financial Statements for more information.

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands): 

	June 30, 2020		December 31, 2019
Accrued payroll and benefits	$	82,256	$	162,486
Accrued expenses	55,844		55,529
Current operating lease liabilities	20,860		15,737
Accrued professional fees	19,506		10,410
Accrued sales tax and value added tax	11,733		9,089
Accrued warranty	11,629		11,205
Others	42,946		55,502
Total accrued liabilities	$	244,774	$	319,958

Schedule of Warranty Accrual

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. We also warrant our CAD/CAM software for a one year period to perform in accordance with agreed product specifications. As we have not historically incurred any material warranty costs, we do not accrue for these software warranties. Warranty accrual consists of the following activity (in thousands):

	Six Months Ended June 30,
	2020		2019
Balance at beginning of period	$	11,205	$	8,551
Charged to cost of net revenues	5,820		6,000
Actual warranty expenditures	(5,396)		(4,052)
Balance at end of period	$	11,629	$	10,499

Schedule of Deferred Revenues

Deferred revenues consist of the following (in thousands):

	June 30, 2020		December 31, 2019
Deferred revenues - current	$	601,831	$	563,762
Deferred revenues - long-term 1	$	36,142	$	35,503

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