Fair value measurement (Tables)

6 Months Ended

Jun. 30, 2013

Schedule of financial assets and financial liabilities that are measured at fair value on a recurring basis

At June 30, 2013	Level 1		Level 2		Level 3			Total
Assets:
Cash equivalents	$	41,165	$	—	$	—		$	41,165
Marketable securities	—		39,426		—			39,426
Restricted cash	30		—		—			30
Total assets	$	41,195	$	39,426	$	—		$	80,621
Liabilities:
Contingent consideration	$	—	$	—	$	(1,329	)	$	(1,329	)
Total liabilities	$	—	$	—	$	(1,329	)	$	(1,329	)

At December 31, 2012	Level 1		Level 2		Total
Assets:
Cash equivalents	$	39,001	$	2,460	$	41,461
Marketable securities	—		41,558		41,558
Restricted cash	30		—		30
Total assets	$	39,031	$	44,018	$	83,049

Schedule of reconciliation of the beginning and ending amounts related to the fair value of contingent consideration for the Endeka acquisition, categorized as Level 3

Beginning balance, January 1, 2013	$	—
Contingent consideration for acquisition of business	1,329
Change in fair value	—
Balance, June 30, 2013	$	1,329

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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