Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 14,601	$ 12,960
Restricted cash	1,354	2,244
Accounts receivable, net	1,478	1,226
Prepaid expenses and other current assets	2,769	2,728
Total current assets	20,202	19,158
Property and equipment, net	27,494	28,130
Deferred lease costs	957	0
Other assets	1,181	1,154
Total assets	49,834	48,442
Liabilities and stockholders' equity
Short-term loan, related party	0	35,000
Accounts payable	2,079	1,895
Accrued expenses and other current liabilities	5,450	5,256
Total current liabilities	7,529	42,151
Long-term loan, related party	17,426	0
Total liabilities	24,955	42,151
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value, 150,000 shares authorized, 29,931 and 23,160 shares issued and outstanding in 2011 and 2010, respectively	299	232
Additional paid-in capital	145,204	126,545
Accumulated deficit	(127,479)	(127,341)
Total stockholders' equity	24,879	6,291
Total liabilities and stockholders' equity	49,834	48,442
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock	0	0
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock	0	0
Series E Preferred Stock [Member]
Stockholders' equity:
Preferred stock	$ 6,855	$ 6,855