CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 36,212	$ 44,406
Investments (Note 4)		242
Trade receivables	919	1,291
Inventories (Note 6)	3,628	3,388
Value added tax receivable (Note 7)	4,784	4,422
Prepaid expenses and other assets (Note 5)	901	1,044
Total current assets	46,444	54,793
Property, plant and equipment, net (Note 8)	279,420	280,905
Assets held for sale		575
Goodwill (Note 9)	11,666	11,666
Prepaid expenses and other assets (Note 5)	130	163
Total assets	337,660	348,102
Current liabilities
Accounts payable and other accrued liabilities (Note 10)	4,505	6,232
Other current liabilities (Note 12)	7,098	7,074
Total current liabilities	11,603	13,306
Asset retirement obligation (Note 11)	2,498	2,259
Deferred tax liability (Note 14)	43,868	47,072
Other long term liabilities (Note 12)	168	193
Total liabilities	58,137	62,830
Commitments and contingencies (Note 18)
Equity (Note 15)
Common stock, $.01 par value, 100,000,000 shares authorized; 43,268,333 and 43,265,833 shares issued and outstanding, respectively	433	433
Additional paid in capital	493,596	493,175
Accumulated deficit	(214,506)	(208,246)
Accumulated other comprehensive loss		(90)
Parent company's shareholder's equity	279,523	285,272
Total liabilities and equity	$ 337,660	$ 348,102