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Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	135 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2012 Current Marketable Equity Securities [Member]	Mar. 31, 2013 Current Marketable Equity Securities [Member]
Schedule of Marketable Securities [Line Items]
Cost	$ 679	$ 679	$ 624	$ 624	$ 679
Unrealized gain (loss)	(218)	(218)	2	2	(218)
Fair value	461	461	626	626	461
Write down of marketable securities		959		39
Dividend Income Paid in Shares	$ 109

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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