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Cash and Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2013

Cash and Cash Equivalents

Summary of cash and cash equivalents

		December 31,
		2012				2013
Cash		$	4,090			$	4,670
Investments with original maturity of less than three months at the time of purchase			12,322				26,476
Total cash and cash equivalents		$	16,412			$	31,146

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Tabular disclosure of the components of cash and cash equivalents.

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