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Cash, Cash Equivalents and Marketable Securities and Assets Measured at Fair Value (Tables)

3 Months Ended

Mar. 31, 2013

Cash, Cash Equivalents and Marketable Securities and Assets Measured at Fair Value [Abstract]

Cash, cash equivalents and marketable securities

Our cash, cash equivalents and marketable securities are as follows (in thousands):

		Cash, Cash Equivalents and Marketable Securities
		Amortized Cost				Unrealized Gains				Unrealized Losses				Estimated Fair Value				Accrued Interest				Total Value
March 31, 2013
Cash and cash equivalents		$	28,714			$	—			$	—			$	28,714			$	—			$	28,714
Corporate securities			25,676				1				—				25,677				—				25,677
		$	54,390			$	1			$	—			$	54,391			$	—			$	54,391
Reported as:
Cash and cash equivalents		$	28,714			$	—			$	—			$	28,714			$	—			$	28,714
Marketable securities			25,676				1				—				25,677				—				25,677
		$	54,390			$	1			$	—			$	54,391			$	—			$	54,391
Maturities:
Matures in one year or less		$	54,390			$	1			$	—			$	54,391			$	—			$	54,391
Matures one to three years			—				—				—				—				—				—
		$	54,390			$	1			$	—			$	54,391			$	—			$	54,391
December 31, 2012
Cash and cash equivalents		$	49,352			$	3			$	—			$	49,355			$	—			$	49,355
Corporate securities		$	6,898				1				—				6,899				—				6,899
		$	56,250			$	4			$	—			$	56,254			$	—			$	56,254
Reported as:
Cash and cash equivalents		$	49,352			$	3			$	—			$	49,355			$	—			$	49,355
Marketable securities			6,898				1				—				6,899				—				6,899
		$	56,250			$	4			$	—			$	56,254			$	—			$	56,254
Maturities:
Matures in one year or less		$	56,250			$	4			$	—			$	56,254			$	—			$	56,254
Matures one to three years			—				—				—				—				—				—
		$	56,250			$	4			$	—			$	56,254			$	—			$	56,254

Assets measured at fair value on recurring basis

Our assets measured at fair value on a recurring basis are as follows (in thousands):

		Level 1				Level 2				Level 3				Total
March 31, 2013
Cash and money market fund		$	28,714			$	—			$	—			$	28,714
Corporate securities			—				25,677				—				25,677
		$	28,714			$	25,677			$	—			$	54,391
		Level 1				Level 2				Level 3				Total
December 31, 2012
Cash and money market fund		$	1,817			$	—			$	—			$	1,817
Corporate securities			—				54,437				—				54,437
		$	1,817			$	54,437			$	—			$	56,254

X

- Definition

Cash cash equivalents and marketable securities.

+ References

No definition available.

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- Details

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258

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