Cash and cash equivalents and marketable securities

12 Months Ended

Dec. 31, 2011

Cash and cash equivalents and marketable securities

Cash and cash equivalents and marketable securities

3. Cash and cash equivalents and marketable securities

        Cash and cash equivalents, and marketable securities consisted of the following:

	December 31,
	2011		2010
Cash and cash equivalents:
Cash	$	12,851	$	10,931
Money market accounts		81,082		14,790
Total cash and cash equivalents	$	93,933	$	25,721
Short-term marketable securities—available-for-sale:
United States government securities	$	—	$	9,373
Total short-term marketable securities	$	—	$	9,373

        All contractual maturities of U.S. government marketable securities were less than one year at December 31, 2010 and were fully guaranteed. For the years ended December 31, 2011, 2010 and 2009, interest income was $37, $31 and $53, respectively, which is included in interest and other income (expense), net in the accompanying consolidated statements of operations.