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Fair Value Measurement of Assets and Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2013
Fair Value Disclosures [Abstract] |
Summary of Company's Financial Instruments, Fair Value on a Recurring Basis | The following table summarizes the Company’s financial instruments measured at fair value on a recurring basis in accordance with the authoritative guidance for fair value measurements as of September 30, 2013 (in thousands):
Description |  | September 30, 2013 |  |  | Level 1 |  |  | Level 2 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 47 |  |  | $ | 47 |  |  | $ | 0 |
US Treasury securities |  |  | 2,208 |  |  |  | 0 |  |  |  | 2,208 |
Total cash equivalents |  |  | 2,255 |  |  |  | 47 |  |  |  | 2,208 |
Short-term marketable securities: |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Government agency securities |  |  | 3,353 |  |  |  | 0 |  |  |  | 3,353 |
Municipal bonds |  |  | 5,877 |  |  |  | 0 |  |  |  | 5,877 |
Certificates of deposit |  |  | 5,001 |  |  |  | 0 |  |  |  | 5,001 |
Corporate debentures / bonds |  |  | 10,201 |  |  |  | 0 |  |  |  | 10,201 |
Total short-term marketable securities |  |  | 24,432 |  |  |  | 0 |  |  |  | 24,432 |
Long-term marketable securities: |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | 2,740 |  |  |  | 0 |  |  |  | 2,740 |
Corporate debentures / bonds |  |  | 2,576 |  |  |  | 0 |  |  |  | 2,576 |
Total long-term marketable securities |  |  | 5,316 |  |  |  | 0 |  |  |  | 5,316 |
Total financial assets |  | $ | 32,003 |  |  | $ | 47 |  |  | $ | 31,956 |
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 of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: 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=25499696&loc=d3e19207-110258 Reference 2: 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=25499696&loc=SL7498348-110258 Reference 3: 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=25499696&loc=d3e19279-110258 Reference 4: 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=25499696&loc=d3e19190-110258 + Details
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