Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 14,010	$ 24,625
Accounts receivable	2,042	1,358
Inventories	4,027	3,581
Prepaid expenses and other current assets	861	1,163
Total current assets	20,940	30,727
Property, plant and equipment, net	82,510	83,475
Debt issue costs, net	567	801
Restricted deposits	2,611
Deposits and other assets	853	1,352
Total assets	107,481	116,355
Current liabilities:
Accounts payable and accrued liabilities	7,433	13,030
Current portion of secured debt, net of $34 and $492 discount at September 30, 2014 and December 31, 2013, respectively	253	788
Derivative warrant liability	2,877	7,243
Total current liabilities	10,563	21,061
Long-term portion of secured debt, net of $25 and $450 discount at September 30, 2014 and December 31, 2013, respectively	561	9,339
2017 notes recorded at fair value	25,564
2022 notes, net	12,920	14,501
Other long-term liabilities	348	479
Total liabilities	49,956	45,380
Commitments and Contingencies (see note 12)
Stockholders' Equity
Preferred stock, $0.01 par value per share; 10,000,000 shares authorized; none issued and outstanding at September 30, 2014 and December 31, 2013
Common stock, $0.01 par value per share; 250,000,000 authorized; 99,592,898 and 68,492,894 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively	991	685
Additional paid-in capital	348,753	332,443
Deficit accumulated	(292,219)	(262,153)
Total stockholders' equity	57,525	70,975
Total liabilities and stockholders' equity	$ 107,481	$ 116,355