Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 6,435	$ 7,526
Restricted cash	1,710	1,070
Accounts receivable, net	1,048us-gaap_AccountsReceivableNetCurrent	1,178us-gaap_AccountsReceivableNetCurrent
Prepaid expenses and other current assets	4,297	3,023
Total current assets	13,490us-gaap_AssetsCurrent	12,797us-gaap_AssetsCurrent
Property and equipment, net	26,372us-gaap_PropertyPlantAndEquipmentNet	26,155us-gaap_PropertyPlantAndEquipmentNet
Other assets	5us-gaap_OtherAssetsNoncurrent	95us-gaap_OtherAssetsNoncurrent
Total assets	39,867us-gaap_Assets	39,047us-gaap_Assets
Current liabilities:
Accounts payable	2,205us-gaap_AccountsPayableCurrent	2,555us-gaap_AccountsPayableCurrent
Accrued expenses and other current liabilities	8,098us-gaap_AccruedLiabilitiesCurrent	6,041us-gaap_AccruedLiabilitiesCurrent
Total current liabilities	10,303us-gaap_LiabilitiesCurrent	8,596us-gaap_LiabilitiesCurrent
Long-term loan, related party	17,426	17,426
Total liabilities	56,968us-gaap_Liabilities	48,822us-gaap_Liabilities
Stockholders’ deficit:
Common stock	395us-gaap_CommonStockValue	365us-gaap_CommonStockValue
Additional paid-in capital	175,801us-gaap_AdditionalPaidInCapital	159,027us-gaap_AdditionalPaidInCapital
Accumulated deficit	(193,297)	(169,167)
Total stockholders’ deficit	(17,101)us-gaap_StockholdersEquity	(9,775)us-gaap_StockholdersEquity
Total liabilities and stockholders’ deficit	39,867	39,047
Series A [Member]
Stockholders’ deficit:
Preferred stock	0	0
Series B [Member]
Stockholders’ deficit:
Preferred stock	0	0
Series E [Member]
Current liabilities:
Series E preferred stock payable - 1,551 Shares as of December 31, 2014	29,239	22,800
Stockholders’ deficit:
Preferred stock	$ 0	$ 0

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682