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Cash And Cash Equivalents (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Cash And Cash Equivalents [Abstract]
Cash	$ 13,248		$ 6,461
Cash equivalents	58	[1]	5,022	[1]
Cash and cash equivalents	$ 13,306		$ 11,483		$ 6,657	$ 7,253
Weighted average interest rate of cash on deposit	0.11%		1.79%
[1] Comprised mainly of deposits in banks as at December 31, 2011 and 2012 carrying a weighted average interest rate of 1.79% and 0.11%, respectively.

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Weighted average interest rate of cash on deposit

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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