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Fair Value Measurement of Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurement of Assets and Liabilities [Abstract]

Summary of Company's financial instrument, fair value on a recurring basis

Description		March 31, 2013				Level 1				Level 2
Assets:
Cash equivalents
Money market funds		$	47			$	47			$	0
US Treasury securities			731				0				731
Total cash equivalents			778				47				731
Short-term marketable securities:
Available-for-sale:
Government agency securities			4,272				0				4,272
Municipal bonds			11,387				0				11,387
Certificates of deposit			4,999				0				4,999
Corporate debentures / bonds			9,337				0				9,337
Total short-term marketable securities			29,995				0				29,995
Long-term marketable securities:
Available-for-sale:
Municipal bonds			1,670				0				1,670
Certificates of deposit			1,920				0				1,920
Corporate debentures / bonds			6,272				0				6,272
Total long-term marketable securities			9,862				0				9,862
Total financial assets		$	40,635			$	47			$	40,588

Description		December 31, 2012				Level 1				Level 2
Assets:
Cash equivalents
Money market funds		$	47			$	47			$	0
US Treasury securities			3,429				0				3,429
Total cash equivalents			3,476				47				3,429
Short-term marketable securities:
Available-for-sale:
Government agency securities			3,266				0				3,266
Municipal bonds			11,260				0				11,260
Certificates of deposit			6,205				0				6,205
Corporate debentures / bonds			17,333				0				17,333
Total short-term marketable securities			38,064				0				38,064
Long-term marketable securities:
Available-for-sale:
Certificates of deposit			1,201				0				1,201
Total long-term marketable securities			1,201				0				1,201
Total financial assets		$	42,741			$	47			$	42,694

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- Definition

Tabular disclosure related to assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a recurring and/or nonrecurring basis in periods after initial recognition. Disclosures include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3) as well as transfers between levels 1 and 2.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 6

-Footnote 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a,b,bb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2C

-URI http://asc.fasb.org/extlink&oid=7578670&loc=SL7498348-110258



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258



Reference 6: 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



Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 33

-Subparagraph a, b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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