Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventory

The components of inventory consist of the following (in thousands):

	December 31,
	2020		2019
Raw materials	$	79,090	$	67,829
Work-in-progress	29,063		21,207
Finished goods	33,906		20,570
	$	142,059	$	109,606

Schedule of Prepaid Expense and Other Current Assets

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

	December 31,
	2020		2019
Government incentives receivable	$	479	$	893
Prepaid hardware and software maintenance	5,227		3,763
Receivables from employees	5,160		6,130
Other prepaid expenses and other current assets	19,852		17,282
	$	30,718	$	28,068

Schedule of Property, Plant and Equipment

Depreciation is calculated using the straight-line method over the estimated depreciable lives of the respective assets as follows:

	Depreciable Lives
Energy Servers	15-21 years
Computers, software and hardware	3-5 years
Machinery and equipment	5-10 years
Furniture and fixtures	3-5 years
Leasehold improvements	1-10 years
Buildings	*

* Lesser of 35 years or the term of the underlying land lease.

Property, plant and equipment, net, consists of the following (in thousands):

	December 31,
	2020		2019
Energy Servers	$	669,422	$	650,600
Computers, software and hardware	20,432		20,275
Machinery and equipment	106,644		101,650
Furniture and fixtures	8,455		8,339
Leasehold improvements	37,497		35,694
Building	46,730		40,512
Construction in progress	21,118		12,611
	910,298		869,681
Less: accumulated depreciation	(309,670)		(262,622)
	$	600,628	$	607,059

Schedule of Other Long-Term Assets

Other long-term assets consist of the following (in thousands):

	December 31,
	2020		2019
Prepaid and other long-term assets	$	24,116	$	29,153
Deferred commissions	6,732		5,007
Equity-method investments	1,954		5,733
Long-term deposits	1,709		1,759
	$	34,511	$	41,652

Schedule of Accrued Warranty

Accrued warranty liabilities consist of the following (in thousands):

	December 31,
	2020		2019
Product warranty	$	1,549	$	2,345
Product performance	8,605		7,536
Maintenance services contracts	109		453
	$	10,263	$	10,334

Changes in the product warranty and product performance liabilities were as follows (in thousands):

Balances at December 31, 2018	$	9,668
Cumulative effect upon adoption of ASC 606	1,032
Accrued warranty, net	1,849
Warranty expenditures during period	(2,668)
Balances at December 31, 2019	9,881
Accrued warranty, net	5,944
Warranty expenditures during the year	(5,671)
Balances at December 31, 2020	$	10,154

Schedule of Accrued Other Current Liabilities

Accrued expenses and other current liabilities consist of the following (in thousands):

	December 31,
	2020		2019
Compensation and benefits	$	28,343	$	17,173
Current portion of derivative liabilities	19,116		4,834
Sales-related liabilities	14,479		416
Accrued installation	16,468		10,348
Sales tax liabilities	2,732		3,849
Interest payable	2,224		3,875
Other	28,642		29,789
	$	112,004	$	70,284

Schedule of Other Long-Term Liabilities

Other long-term liabilities consist of the following (in thousands):

	December 31,
	2020		2019
Delaware grant	$	9,212	$	10,469
Other	3,067		17,544
	$	12,279	$	28,013