Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Inventory, net

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

	December 31,
	2018		2017
Raw materials	$	53,273	$	49,963
Work-in-progress	22,303		19,998
Finished goods	56,900		20,299
	$	132,476	$	90,260

Prepaid Expense and Other Current Assets

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

	December 31,
	2018		2017
Government incentives receivable	$	1,001	$	1,836
Prepaid expenses and other current assets	32,741		24,840
	$	33,742	$	26,676

Property, Plant and Equipment, Net

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	35 years

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

	December 31,
	2018			2017
Energy Servers	$	511,485		$	511,153
Computers, software and hardware	16,536			19,384
Machinery and equipment	99,209			97,158
Furniture and fixtures	4,337			4,679
Leasehold improvements	18,629			22,799
Building	40,512			40,512
Construction in progress	29,084			9,898
	719,792			705,583
Less: Accumulated depreciation	(238,378		)	(207,794		)
	$	481,414		$	497,789

Other Long-Term Assets

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

	December 31,
	2018		2017
Prepaid and other long-term assets	$	27,086	$	31,446
Equity-method investments	6,046		5,014
Long-term deposits	1,660		1,000
	$	34,792	$	37,460

Accrued Warranty

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

	December 31,
	2018		2017
Product warranty	$	10,935	$	7,661
Operations and maintenance services agreements	8,301		9,150
	$	19,236	$	16,811

Changes in the standard product warranty liability were as follows (in thousands):

Balances at December 31, 2015	$	8,707
Accrued warranty, net	4,124
Warranty expenditures during period	(4,727		)
Balances at December 31, 2016	8,104
Accrued warranty, net	7,058
Warranty expenditures during period	(7,501		)
Balances at December 31, 2017	7,661
Accrued warranty, net	11,155
Warranty expenditures during period	(7,881		)
Balances at December 31, 2018	$	10,935

Accrued Other Current Liabilities

Accrued other current liabilities consisted of the following (in thousands):

	December 31,
	2018		2017
Compensation and benefits	$	16,742	$	13,121
Current portion of derivative liabilities	3,232		5,492
Managed services liabilities	5,091		3,678
Accrued installation	6,859		3,348
Sales tax liabilities	1,700		5,524
Interest payable	4,675		5,520
Other	31,236		30,966
	$	69,535	$	67,649

Other Long-Term Liabilities

Accrued other long-term liabilities consisted of the following (in thousands):

	December 31,
	2018		2017
Delaware grant	$	10,469	$	10,469
Managed services liabilities	29,741		31,087
Other	15,727		11,359
	$	55,937	$	52,915

Customer Financing Leases, Receivable

The components of investment in sales-type financing leases consisted of the following (in thousands):

	December 31,
	2018			2017
Total minimum lease payments to be received	$	100,816		$	109,431
Less: Amounts representing estimated executing costs	(25,180		)	(27,815		)
Net present value of minimum lease payments to be received	75,636			81,616
Estimated residual value of leased assets	1,051			1,051
Less: Unearned income	(4,011		)	(4,781		)
Net investment in sales-type financing leases	72,676			77,886
Less: Current portion	(5,594		)	(5,209		)
Non-current portion of investment in sales-type financing leases	$	67,082		$	72,677

Schedule of Customer Payments from Sales-Type Financing Leases

The future scheduled customer payments from sales-type financing leases were as follows as of December 31, 2018 (in thousands):

	2019		2020		2021		2022		2023		Thereafter
Future minimum lease payments, less interest	$	5,594	$	6,022	$	6,415	$	6,853	$	7,310	$	39,431