CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 2,143	$ 21,813
Restricted cash - interest payments held in escrow	883	886
Prepaid expenses and other current assets	1,473	1,402
Total current assets	4,499	24,101
Non-current assets:
Property, plant and equipment, net	46,892	46,157
Restricted cash - interest payments held in escrow, net of current portion	77	349
Other assets	141	190
Total non-current assets	47,110	46,696
Total assets	51,609	70,797
Current liabilities:
Accounts payable	12,318	11,721
Accounts payable to related party	7,575	5,455
Accrued expenses (includes related party of $13 and $11 as of June 30, 2016 and December 31, 2015, respectively)	1,341	1,309
Convertible notes, net (includes related party note of $50 as of June 30, 2016 and December 31, 2015)	185	185
Note payable - in dispute	934	934
Mortgage loan (net of deferred financing cost of $466 and $468 as of June 30, 2016 and December 31, 2015, respectively)	10,339	11,144
Environmental remediation liability	6,200	6,200
Shares payable to related party	10,480	0
Derivative liability	10,527	27,982
Total current liabilities	59,899	64,930
Non-current liabilities:
Convertible note (net of deferred financing cost of $317 and $457 as of June 30, 2016 and December 31, 2015, respectively)	10,683	10,543
Total non-current liabilities	10,683	10,543
Total liabilities	70,582	75,473
Commitments and Contingencies
Stockholders' equity (deficit):
Preferred stock ($0.001 par value); 40,000,000 shares authorized; 0 shares issued and outstanding as of June 30, 2016 and December 31, 2015, respectively	0	0
Common stock ($0.001 par value); 450,000,000 shares authorized; 106,167,204 and 95,858,087 shares issued and outstanding as of June 30, 2016 and December 31, 2015, respectively	106	96
Additional paid-in capital	635,550	630,613
Accumulated deficit	(655,543)	(635,262)
Accumulated other comprehensive gain (loss)	914	(123)
Total stockholders' equity (deficit)	(18,973)	(4,676)
Total liabilities and stockholders' equity (deficit)	$ 51,609	$ 70,797