Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 45,430	$ 43,531
Accounts receivable, net	209	248
Inventories, net	21,126	25,106
Prepaid expenses and other current assets	10,994	8,864
Total current assets	77,759	77,749
Property and equipment, net	133,223	181,806
Other noncurrent assets	4,550	6,510
TOTAL ASSETS	215,532	266,065
CURRENT LIABILITIES:
Accounts payable	26,272	23,972
Accrued expenses and other current liabilities	26,478	30,366
Deferred revenue	6,966	6,120
Total current liabilities	59,716	60,458
Long-term debt	53,828	53,464
Facility financing obligation	35,976	71,689
Other noncurrent liabilities	12,143	12,455
TOTAL LIABILITIES	161,663	198,066
STOCKHOLDERS' EQUITY (DEFICIT):
Additional paid-in capital	604,877	599,976
Accumulated deficit	(551,010)	(531,979)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	53,869	67,999
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)	215,532	266,065
Class A
STOCKHOLDERS' EQUITY (DEFICIT):
Common Stock	1	1
Class B
STOCKHOLDERS' EQUITY (DEFICIT):
Common Stock	$ 1	$ 1