CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Allowance for doubtful accounts		$ 1,200	$ 703
Common stock, par value		$ 0.0001	$ 0.0001
Common stock, shares authorized		2,000,000,000	119,547,000
Common stock, shares issued		100,807,000	24,249,000
Common stock, shares outstanding		100,807,000	24,249,000
Total assets	[1]	$ 2,583,026	$ 1,935,632
Solar energy systems, net		1,837,047	1,480,223
Cash and cash equivalents		263,006	152,154
Accounts receivable, net		53,717	43,189
Prepaid expenses and other current assets		8,375	9,560
Total liabilities	[1]	1,760,078	1,383,065
Accounts payable		97,908	51,166
Distributions payable to noncontrolling interests and redeemable noncontrolling interests		7,224	6,764
Accrued expenses and other liabilities		45,636	25,445
Long-term debt		468,816	239,251
Variable Interest Entities
Total assets		1,317,653	986,878
Solar energy systems, net		1,232,009	942,655
Cash and cash equivalents		68,890	29,099
Restricted cash		742	593
Accounts receivable, net		15,882	14,351
Prepaid expenses and other current assets		130	180
Total liabilities		519,813	474,348
Accounts payable		15,364	9,057
Distributions payable to noncontrolling interests and redeemable noncontrolling interests		7,174	6,426
Accrued expenses and other liabilities		188	340
Deferred revenue		347,832	301,792
Deferred grants		117,735	123,351
Long-term debt		$ 31,520	$ 33,382
Convertible Preferred Stock
Preferred stock, par value		$ 0.0001	$ 0.0001
Preferred stock, shares authorized		200,000,000	57,028,000
Preferred stock, shares issued		0	54,841,000
Preferred stock, shares outstanding		0	54,841,000
Aggregate liquidation preference		$ 0	$ 305,883

[1] The Company’s consolidated assets as of September 30, 2015 and December 31, 2014 include $1,317,653 (unaudited) and $986,878, respectively, in assets of variable interest entities, or VIEs, that can only be used to settle obligations of the VIEs. Solar energy systems, net, as of September 30, 2015 and December 31, 2014 were $1,232,009 (unaudited) and $942,655, respectively; cash and cash equivalents as of September 30, 2015 and December 31, 2014 were $68,890 (unaudited) and $29,099, respectively; restricted cash as of September 30, 2015 and December 31, 2014 were $742 (unaudited) and $593, respectively; accounts receivable, net as of September 30, 2015 and December 31, 2014 were $15,882 (unaudited) and $14,351; respectively; prepaid expenses and other current assets as of September 30, 2015 and December 31, 2014 were $130 (unaudited) and $180, respectively. The Company’s consolidated liabilities as of September 30, 2015 and December 31, 2014 include $519,813 (unaudited) and $474,348, respectively, in liabilities of VIEs whose creditors have no recourse to the Company. These liabilities include accounts payable as of September 30, 2015 and December 31, 2014 of $15,364 (unaudited) and $9,057, respectively; distributions payable to noncontrolling interests and redeemable noncontrolling interests as of September 30, 2015 and December 31, 2014 of $7,174 (unaudited) and $6,426, respectively; accrued expenses and other liabilities as of September 30, 2015 and December 31, 2014 of $188 (unaudited) and $340, respectively; deferred revenue as of September 30, 2015 and December 31, 2014 of $347,832 (unaudited) and $301,792, respectively; deferred grants as of September 30, 2015 and December 31, 2014 of $117,735 (unaudited) and $123,351, respectively; and long-term debt as of September 30, 2015 and December 31, 2014 of $31,520 (unaudited) and $33,382, respectively