Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 36,463	$ 185,606
Marketable securities	12,003
Restricted cash	102	101
Accounts receivable, net	22,170	6,483
Inventory	14,770	3,717
Prepaid expenses and other current assets	4,109	5,487
Total current assets	89,617	201,394
Restricted cash	674	584
Property and equipment, net	17,564	21,915
Other assets	27	27
Intangible assets, net	6,922	7,355
Goodwill	3,605	3,605
Total assets	118,409	234,880
Current liabilities:
Accounts payable, accrued expenses and other	49,699	52,082
Deferred revenues	36,610	50,137
Deferred rent	1,974	1,527
Total current liabilities	88,283	103,746
Deferred revenues, net of current portion	36,328	51,197
Deferred rent, net of current portion	3,905	4,926
Deferred tax incentives, net of current portion	165	1,045
Long-term debt	216,871	257,655
Total liabilities	345,552	418,569
Commitments and contingencies
Non-controlling interest	(361)	239
Stockholders’ deficit:
Preferred stock, $0.01 par value: 10,000 shares authorized at September 30, 2016 and December 31, 2015; no shares issued or outstanding at September 30, 2016 or December 31, 2015
Common stock, $0.01 par value: 200,000 shares authorized at September 30, 2016 and December 31, 2015; 129,435 and 115,871 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	1,294	1,159
Additional paid-in capital	693,449	617,145
Accumulated other comprehensive loss	(2)
Accumulated deficit	(921,523)	(802,232)
Total stockholders’ deficit	(226,782)	(183,928)
Total liabilities, non-controlling interest and stockholders’ deficit	$ 118,409	$ 234,880