Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 785,877	$ 230,146
Accounts receivable	5,343	679
Inventories	14,700	1,106
Other current assets	8,919	4,560
Total current assets	814,839	236,491
Intangible assets, net	12,877	14,732
Property and equipment, net	6,640	2,779
Restricted cash	1,694	500
Other assets	3,795	779
Total assets	839,845	255,281
Current liabilities:
Accounts payable	5,236	8,019
Accrued expenses	68,271	36,628
Deferred revenue, current	288	500
Other current liabilities	2,978	1,534
Total current liabilities	76,773	46,681
Convertible notes, net	131,775	121,325
Deferred revenue, non-current		288
Customer Deposits, Noncurrent	15,000
Other non-current liabilities	5,086	113
Total liabilities	228,634	168,407
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at both December 31, 2015 and June 30, 2016; no shares issued or outstanding at both December 31, 2015 and June 30, 2016
Common stock, $0.0001 par value; 100,000,000 shares authorized at both December 31, 2015 and September 30, 2016; 40,279,783 and 51,656,692 shares issued and outstanding at December 31, 2015 and September 30, 2016, respectively	5	4
Additional paid-in capital	1,604,798	688,788
Accumulated other comprehensive loss	(2,924)
Accumulated deficit	(990,668)	(601,918)
Total stockholders' equity	611,211	86,874
Total liabilities and stockholders' equity	$ 839,845	$ 255,281