Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 395,516	$ 103,828
Restricted cash, current	17,931	44,387
Accounts receivable	41,485	30,317
Customer financing receivable	5,496	5,209
Prepaid expense and other current assets	32,876	26,676
Property, plant and equipment, net	471,074	497,789
Non-current portion of investment in sales-type financing leases	68,535	72,677
Restricted cash, non-current	30,779	32,397
Other long-term assets	37,008	37,460
Accounts payable	59,818	48,582
Accrued other current liabilities	66,873	67,649
Deferred revenue and customer deposits	105,265	118,106
Current portion of debt	20,185	18,747
Current portion of debt from related parties	1,737	1,389
Derivative liabilities	9,441	156,552
Deferred revenue and customer deposits	290,481	309,843
Long-term portion of debt from related parties	66,933	105,650
Other long-term liabilities	$ 48,161	$ 52,915
Convertible redeemable preferred stock, shares authorized (in shares)	80,461,552	80,461,609
Convertible redeemable preferred stock, shares issued (in shares)	0	71,740,162
Convertible redeemable preferred stock, shares outstanding (in shares)	0	71,740,162
Convertible redeemable preferred stock, aggregate liquidation preference	$ 0	$ 1,441,757
Common stock: $0.0001 par value; Class A shares, 400,000,000 shares and no shares authorized at September 30, 2018 and December 31, 2017, respectively, and 20,865,308 shares and no shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively; Class B shares, 400,000,000 shares and no shares authorized at September 30, 2018 and December 31, 2017, respectively, and 88,534,989 shares and no shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively.	11	1
Common stock: $0.0001 par value; Class A shares, 400,000,000 shares and no shares authorized at September 30, 2018 and December 31, 2017, respectively, and 20,865,308 shares and no shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively; Class B shares, 400,000,000 shares and no shares authorized at September 30, 2018 and December 31, 2017, respectively, and 88,534,989 shares and no shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively.	$ 11	$ 1
Common stock, par value (in dollars per share)	$ 0	$ 0.0001
Common stock, authorized (in shares)	0	113,333,333
Common stock, issued (in shares)	0	10,353,269
Common stock, outstanding (in shares)	0	10,353,269
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents	$ 5,496	$ 9,549
Restricted cash, current	3,252	7,969
Accounts receivable	7,377	7,680
Customer financing receivable	5,496	5,209
Prepaid expense and other current assets	5,727	6,365
Property, plant and equipment, net	406,784	430,464
Non-current portion of investment in sales-type financing leases	68,535	72,677
Restricted cash, non-current	27,778	26,748
Other long-term assets	4,702	3,767
Accounts payable	549	520
Accrued other current liabilities	1,145	2,378
Deferred revenue and customer deposits	786	786
Current portion of debt	18,498	18,446
Current portion of debt from related parties	1,737	1,389
Derivative liabilities	1,826	5,060
Deferred revenue and customer deposits	8,894	9,482
Long-term portion of debt	293,593	306,499
Long-term portion of debt from related parties	34,765	35,551
Other long-term liabilities	$ 1,656	$ 1,226
Common Class A and B
Common stock, par value (in dollars per share)	$ 0.0001
Class A common stock
Common stock, authorized (in shares)	400,000,000	0
Common stock, issued (in shares)	20,865,308	0
Common stock, outstanding (in shares)	20,865,308	0
Class B common stock
Convertible redeemable preferred stock, shares outstanding (in shares)	71,740,162
Common stock, authorized (in shares)	400,000,000	0
Common stock, issued (in shares)	88,534,989	0
Common stock, outstanding (in shares)	88,534,989	0