CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents (Note 3)	$ 6,052	$ 8,579
Short-term investments (Note 3)	119us-gaap_ShortTermInvestments	0us-gaap_ShortTermInvestments
Trade receivables	92us-gaap_AccountsReceivableNetCurrent
Inventories (Note 5)	1,166us-gaap_InventoryNet	1,497us-gaap_InventoryNet
Value added tax receivable, net (Note 6)	949us-gaap_ValueAddedTaxReceivableCurrent	1,316us-gaap_ValueAddedTaxReceivableCurrent
Prepaid expenses and other assets (Note 4)	735	835
Total current assets	9,113us-gaap_AssetsCurrent	12,227us-gaap_AssetsCurrent
Property, plant and equipment, net (Note 7)	27,322us-gaap_PropertyPlantAndEquipmentNet	29,031us-gaap_PropertyPlantAndEquipmentNet
Total assets	36,435us-gaap_Assets	41,258us-gaap_Assets
Current liabilities
Accounts payable and other accrued liabilities (Note 8)	1,905	1,639
Other current liabilities (Note 10)	1,675us-gaap_OtherLiabilitiesCurrent	2,551us-gaap_OtherLiabilitiesCurrent
Total current liabilities	3,580us-gaap_LiabilitiesCurrent	4,190us-gaap_LiabilitiesCurrent
Asset retirement obligation (Note 9)	2,434	2,685
Warrant Liability (Note 11)	904us-gaap_WarrantsAndRightsOutstanding	1,554us-gaap_WarrantsAndRightsOutstanding
Other long term liabilities (Note 10)	92us-gaap_OtherLiabilitiesNoncurrent	95us-gaap_OtherLiabilitiesNoncurrent
Total liabilities	7,010us-gaap_Liabilities	8,524us-gaap_Liabilities
Commitments and contingencies (Note 18)
Equity (Note 13)
Common stock, $.01 par value,100,000,000 shares authorized; 53,162,833 shares issued and outstanding for both periods	532us-gaap_CommonStockValue	532us-gaap_CommonStockValue
Additional paid in capital	484,399	484,197
Accumulated deficit	(455,426)	(451,995)
Accumulated other comprehensive loss	(80)
Shareholders' equity	29,425us-gaap_StockholdersEquity	32,734us-gaap_StockholdersEquity
Total liabilities and equity	$ 36,435	$ 41,258

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Name:	us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant