Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents ($9,691 and $9,549, respectively)	$ 91,596	$ 103,828
Restricted cash ($4,735 and $7,969, respectively)	25,860	44,387
Short-term investments	15,703	26,816
Accounts receivable ($7,293 and $7,680, respectively)	36,804	30,317
Inventories, net	136,433	90,260
Deferred cost of revenue	55,476	92,488
Customer financing receivable ($5,398 and $5,209, respectively)	5,398	5,209
Prepaid expense and other current assets ($1,802 and $6,365, respectively)	23,003	26,676
Total current assets	390,273	419,981
Property, plant and equipment, net ($414,684 and $430,464, respectively)	477,765	497,789
Customer financing receivable, non-current ($69,963 and $72,677, respectively)	69,963	72,677
Restricted cash ($27,604 and $26,748, respectively)	32,416	32,397
Deferred cost of revenue, non-current	148,934	160,683
Other long-term assets ($4,423 and $3,767, respectively)	38,386	37,460
Total assets	1,157,737	1,220,987
Current liabilities
Accounts payable ($482 and $520, respectively)	53,798	48,582
Accrued warranty	14,928	16,811
Accrued other current liabilities ($1,569 and $2,378, respectively)	54,832	67,649
Deferred revenue and customer deposits ($786 and $786, respectively)	94,582	118,106
Current portion of debt ($19,655 and $17,057, respectively)	28,376	18,747
Current portion of debt from related parties ($1,630 and $1,389, respectively)	1,630	1,389
Total current liabilities	248,146	271,284
Preferred stock warrant liabilities	2,369	9,825
Derivative liabilities ($2,528 and $5,060, respectively)	188,199	156,552
Deferred revenue and customer deposits ($9,092 and $9,482, respectively)	301,550	309,843
Long-term portion of debt ($333,102 and $342,050, respectively)	822,982	815,555
Long-term portion of debt from related parties ($39,671 and $35,551, respectively)	107,141	105,650
Other long-term liabilities ($1,514 and $1,226, respectively)	52,153	52,915
Total liabilities	1,722,540	1,721,624
Commitments and contingencies (Note 13)
Redeemable noncontrolling interest	54,940	58,154
Convertible redeemable preferred stock: 80,461,609 shares authorized at June 30, 2018 and December 31, 2017; 71,740,162 shares issued and outstanding at June 30, 2018 and December 31, 2017. Aggregate liquidation preference of $1,441,757,000 at June 30, 2018 and December 31, 2017.	1,465,841	1,465,841
Stockholders’ deficit
Common stock: $0.0001 par value; 113,333,333 shares authorized at June 30, 2018 and December 31, 2017; 10,570,841 and 10,353,269 shares issued and outstanding at June 30, 2018 and December 31, 2017.	1	1
Additional paid-in capital	166,805	150,804
Accumulated other comprehensive income (loss)	217	(162)
Accumulated deficit	(2,394,040)	(2,330,647)
Total stockholders’ deficit	(2,227,017)	(2,180,004)
Noncontrolling interest	141,433	155,372
Total deficit	(2,030,644)	(1,966,478)
Total liabilities, convertible redeemable preferred stock and deficit	$ 1,157,737	$ 1,220,987