Balance Sheet Components - Customer Financing Leases Receivable (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Total minimum lease payments to be received		$ 94,151	$ 100,816
Less: Amounts representing estimated executing costs		(23,203)	(25,180)
Net present value of minimum lease payments to be received		70,948	75,636
Estimated residual value of leased assets		1,051	1,051
Less: Unearned income		(3,465)	(4,011)
Net investment in sales-type financing leases		68,534	72,676
Less: Current portion	[1]	(5,919)	(5,594)
Non-current portion of investment in sales-type financing leases	[1]	$ 62,615	$ 67,082

[1] We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12 - Power Purchase Agreement Programs).