Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 16,203	$ 6,359
Accounts receivable	1,134	2,361
Inventories	2,703	4,292
Prepaid expenses and other current assets	618	732
Total current assets	20,658	13,744
Property, plant and equipment, net	76,505	81,240
Debt issue costs, net	376	530
Restricted deposits	2,611	2,611
Deposits and other assets	803	803
Total assets	100,953	98,928
Current liabilities:
Accounts payable and accrued liabilities	6,811	8,588
Current portion of secured debt, net of $20 and $31 discount at September 30, 2015 and December 31, 2014, respectively	320	288
Derivative warrant liability	3,395	3,114
Other current liabilities		35
Total current liabilities	10,526	12,025
Long-term portion of secured debt, net of $4 and $18 discount at September 30, 2015 and December 31, 2014, respectively	241	485
2017 Notes recorded at fair value	21,879	25,460
2022 Notes, net	15,242	13,679
Other long-term liabilities	147	315
Total liabilities	$ 48,035	$ 51,964
Commitments and Contingencies (see note 11)
Stockholders' Equity
Common stock, $0.01 par value per share; 250,000,000 authorized; 16,947,088 and 6,641,870 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 169	$ 66
Additional paid-in capital	384,279	350,196
Deficit accumulated	(331,530)	(303,298)
Total stockholders' equity	52,918	46,964
Total liabilities and stockholders' equity	$ 100,953	$ 98,928