Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts		$ 1,641	$ 703
Preferred stock, par value		$ 0.0001	$ 0.0001
Preferred stock, shares authorized		200,000,000	0
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Common stock, par value		$ 0.0001	$ 0.0001
Common stock, shares authorized		2,000,000,000	119,547,000
Common stock, shares issued		101,282,000	24,249,000
Common stock, shares outstanding		101,282,000	24,249,000
Total assets	[1]	$ 2,738,146	$ 1,932,584
Solar energy systems, net		1,992,021	1,484,251
Cash		203,864	152,154
Accounts receivable, net		60,275	43,189
Prepaid expenses and other current assets		6,696	9,560
Total liabilities	[1]	1,931,447	1,380,017
Accounts payable		104,133	51,166
Distributions payable to noncontrolling interests and redeemable noncontrolling interests		8,144	6,764
Accrued expenses and other liabilities		49,146	25,445
Deferred revenue		618,792	512,124
Long-term debt		538,318	239,251
Variable Interest Entities
Total assets		1,363,615	986,878
Solar energy systems, net		1,305,420	942,655
Cash		44,407	29,099
Restricted cash		757	593
Accounts receivable, net		12,965	14,351
Prepaid expenses and other current assets		66	180
Total liabilities		540,464	474,348
Accounts payable		11,025	9,057
Distributions payable to noncontrolling interests and redeemable noncontrolling interests		8,063	6,426
Accrued expenses and other liabilities		175	340
Deferred revenue		374,736	301,792
Deferred grants		115,726	123,351
Long-term debt		$ 30,739	$ 33,382
Convertible Preferred Stock
Preferred stock, par value		$ 0.0001	$ 0.0001
Preferred stock, shares authorized		0	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 December 31, 2015 and 2014 include $1,363,615 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 December 31, 2015 and 2014 were $1,305,420 and $942,655, respectively; cash as of December 31, 2015 and 2014 were $44,407 and $29,099, respectively; restricted cash as of December 31, 2015 and 2014 were $757 and $593, respectively; accounts receivable, net as of December 31, 2015 and 2014 were $12,965 and $14,351; respectively; prepaid expenses and other current assets as of December 31, 2015 and 2014 were $66 and $180, respectively. The Company’s consolidated liabilities as of December 31, 2015 and 2014 include $540,464 and $474,348, respectively, in liabilities of VIEs whose creditors have no recourse to the Company. These liabilities include accounts payable as of December 31, 2015 and 2014 of $11,025 and $9,057, respectively; distributions payable to noncontrolling interests and redeemable noncontrolling interests as of December 31, 2015 and 2014 of $8,063 and $6,426, respectively; accrued expenses and other liabilities as of December 31, 2015 and 2014 of $175 and $340, respectively; deferred revenue as of December 31, 2015 and 2014 of $374,736 and $301,792, respectively; deferred grants as of December 31, 2015 and 2014 of $115,726 and $123,351, respectively; and long-term debt as of December 31, 2015 and 2014 of $30,739 and $33,382, respectively.