Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventory

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

	December 31,
	2021		2020
Raw materials	$	80,809	$	79,090
Work-in-progress	31,893		29,063
Finished goods	30,668		33,906
	$	143,370	$	142,059

Schedule of Prepaid Expense and Other Current Assets

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

	December 31,
	2021		2020
Prepaid hardware and software maintenance	$	3,494	$	5,227
Receivables from employees	5,463		5,160
Other prepaid expenses and other current assets	21,704		20,331
	$	30,661	$	30,718

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,
	2021		2020
Energy Servers	$	674,799	$	669,422
Computers, software and hardware	21,276		20,432
Machinery and equipment	110,600		106,644
Furniture and fixtures	8,607		8,455
Leasehold improvements	52,936		37,497
Building	48,934		46,730
Construction-in-progress	43,544		21,118
	960,696		910,298
Less: accumulated depreciation	(356,590)		(309,670)
	$	604,106	$	600,628

Schedule of Other Long-Term Assets

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

	December 31,
	2021		2020
Prepaid insurance	$	9,534	$	11,792
Deferred commissions	7,569		6,732
Long-term lease receivable	7,953		6,995
Prepaid and other long-term assets	14,060		8,992
	$	39,116	$	34,511

Schedule of Accrued Warranty

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

	December 31,
	2021		2020
Product warranty	$	961	$	1,549
Product performance	10,785		8,605
Maintenance services contracts	—		109
	$	11,746	$	10,263

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

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
Accrued warranty, net	11,049
Warranty expenditures during the year-to-date period	(9,457)
Balances at December 31, 2021	$	11,746

Schedule of Accrued Other Current Liabilities

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

	December 31,
	2021		2020
Compensation and benefits	$	38,222	$	28,343
Current portion of derivative liabilities	6,059		19,116
Sales-related liabilities	6,040		14,479
Accrued installation	13,968		16,468
Sales tax liabilities	1,491		2,732
Interest payable	2,159		2,224
Other	46,198		28,642
	$	114,138	$	112,004

Schedule of Other Long-Term Liabilities

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

	December 31,
	2021		2020
Delaware grant	$	9,495	$	9,212
Other	7,277		8,056
	$	16,772	$	17,268