Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 58,722	$ 43,531
Accounts receivable, net	112	248
Inventories, net	19,468	25,106
Prepaid expenses and other current assets	22,951	8,864
Total current assets	101,253	77,749
Property and equipment, net	129,163	181,806
Other noncurrent assets	4,472	6,510
TOTAL ASSETS	234,888	266,065
CURRENT LIABILITIES:
Accounts payable	27,159	23,972
Accrued expenses and other current liabilities	36,398	30,366
Current portion of long-term debt	9,136
Deferred revenue	5,773	6,120
Total current liabilities	78,466	60,458
Long-term debt	34,028	53,464
Facility financing obligation	35,971	71,689
Other noncurrent liabilities	12,775	12,455
TOTAL LIABILITIES	161,240	198,066
STOCKHOLDERS' EQUITY (DEFICIT):
Additional paid-in capital	639,918	599,976
Accumulated deficit	(566,272)	(531,979)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	73,648	67,999
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)	234,888	266,065
Class A
STOCKHOLDERS' EQUITY (DEFICIT):
Common Stock	1	1
Class B
STOCKHOLDERS' EQUITY (DEFICIT):
Common Stock	$ 1	$ 1