Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 9,215	$ 7,526
Restricted cash	1,890	1,070
Accounts receivable, net	837	1,178
Prepaid expenses and other current assets	4,632	3,023
Total current assets	16,574	12,797
Property and equipment, net	25,791	26,155
Other assets	27	95
Total assets	42,392	39,047
Current liabilities:
Accounts payable	1,793	2,555
Accrued expenses and other current liabilities	7,278	6,041
Short-term loan, related party	17,426	0
Total current liabilities	26,497	8,596
Long-term loan, related party	0	17,426
Total liabilities	56,667	48,822
Stockholders' equity:
Common stock, $0.01 par value, 150,000 shares authorized, 39,372 and 36,495 shares issued and outstanding as of September 30, 2014 and December 31, 2013, respectively	394	365
Additional paid-in capital	175,210	159,027
Accumulated deficit	(189,879)	(169,167)
Total stockholders' equity	(14,275)	(9,775)
Total liabilities and stockholders' equity	42,392	39,047
Series A [Member]
Stockholders' equity:
Preferred stock, 5,000 shares authorized; $0.01 par value -	0	0
Series B [Member]
Stockholders' equity:
Preferred stock, 5,000 shares authorized; $0.01 par value -	0	0
Series E [Member]
Current liabilities:
Series E preferred stock payable - $10 per share redemption value, 1,551 Shares as of September 30, 2014 and December 31, 2013 (aggregate liquidation value of $30,170 as of September 30, 2014)	30,170	22,800
Stockholders' equity:
Preferred stock, 5,000 shares authorized; $0.01 par value -	$ 0	$ 0