Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents ($5,295 and $9,549)	$ 220,728	$ 103,828
Restricted cash ($2,917 and $7,969)	28,657	44,387
Short-term investments	104,350	26,816
Accounts receivable ($7,516 and $7,680)	84,887	30,317
Inventories	132,476	90,260
Deferred cost of revenue	62,147	92,488
Customer financing receivable ($5,594 and $5,209)	5,594	5,209
Prepaid expense and other current assets ($4,909 and $6,365)	33,742	26,676
Total current assets	672,581	419,981
Property, plant and equipment, net ($399,060 and $430,464)	481,414	497,789
Customer financing receivable, non-current ($67,082 and $72,677)	67,082	72,677
Restricted cash ($27,854 and $26,748)	31,100	32,397
Deferred cost of revenue, non-current	102,699	160,683
Other long-term assets ($2,692 and $3,767)	34,792	37,460
Total assets	1,389,668	1,220,987
Current liabilities:
Accounts payable ($724 and $520)	66,889	48,582
Accrued warranty	19,236	16,811
Accrued other current liabilities ($1,442 and $2,378)	69,535	67,649
Deferred revenue and customer deposits ($786 and $786)	94,158	118,106
Current portion of recourse debt	8,686	1,691
Current portion of non-recourse debt ($18,962 and $17,057)	18,962	17,056
Current portion of recourse debt from related parties	0	0
Current portion of non-recourse debt from related parties ($2,200 and $1,389)	2,200	1,389
Total current liabilities	279,666	271,284
Preferred stock warrant liabilities	0	9,825
Derivative liabilities ($3,626 and $5,060)	10,128	156,552
Deferred revenue and customer deposits ($8,696 and $9,482)	241,794	309,843
Long-term portion of recourse debt	360,339	509,056
Long-term portion of non-recourse debt ($289,241 and $306,499)	289,241	306,499
Long-term portion of recourse debt from related parties	27,734	70,099
Long-term portion of non-recourse debt from related parties ($34,119 and $35,551)	34,119	35,551
Other long-term liabilities ($1,798 and $1,226)	55,937	52,915
Total liabilities	1,298,958	1,721,624
Commitments and contingencies (Note 13)
Redeemable noncontrolling interest	57,261	58,154
Convertible redeemable preferred stock: 80,461,552 shares authorized at December 31, 2018 and December 31, 2017; no shares and 71,740,162 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively. Aggregate liquidation preference of $1,441,757 at December 31, 2017.	0	1,465,841
Stockholders’ deficit:
Common stock: $0.0001 par value; Class A shares, 400,000,000 shares and no shares authorized at December 31, 2018 and December 31, 2017, respectively, and 20,868,286 shares and no shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively; Class B shares, 400,000,000 shares and no shares authorized at December 31, 2018 and December 31, 2017, respectively, and 88,552,897 shares and no shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively.	11	1
Additional paid-in capital	2,480,597	150,804
Accumulated other comprehensive gain (loss)	131	(162)
Accumulated deficit	(2,572,400)	(2,330,647)
Total stockholders’ deficit	(91,661)	(2,180,004)
Noncontrolling interest	125,110	155,372
Total liabilities, redeemable noncontrolling interest, convertible redeemable preferred stock, stockholders' deficit and noncontrolling interest	$ 1,389,668	$ 1,220,987