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Financial Statement Details - Summary of Marketable Securities Available-for-Sale (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 22,616 | $ 39,241
Gross Unrealized Gains | 5 | 24
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 22,621 | 39,265
Short-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 19,173 | 38,041
Gross Unrealized Gains | 5 | 23
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 19,178 | 38,064
Long-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 3,443 | 1,200
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 3,443 | 1,201
Government agency securities [Member] | Short-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Maturity in Years | 1 or less | 1 or less
Amortized Cost | 2,350 | 3,265
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 2,351 | 3,266
Municipal bonds [Member] | Short-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Maturity in Years | 1 or less | 1 or less
Amortized Cost | 2,828 | 11,246
Gross Unrealized Gains | 1 | 14
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 2,829 | 11,260
Certificates of deposit [Member] | Short-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Maturity in Years | 1 or less | 1 or less
Amortized Cost | 3,360 | 6,200
Gross Unrealized Gains | 0 | 5
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 3,360 | 6,205
Certificates of deposit [Member] | Long-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Maturity in Years | 1 to 2 | 1 to 2
Amortized Cost | 1,300 | 1,200
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 1,300 | 1,201
Corporate debentures / bonds [Member] | Short-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Maturity in Years | 1 or less | 1 or less
Amortized Cost | 10,635 | 17,330
Gross Unrealized Gains | 3 | 3
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 10,638 | 17,333
Corporate debentures / bonds [Member] | Long-term marketable securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Maturity in Years | 1 to 2 |
Amortized Cost | 2,143 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 0 |
Estimated Fair Value | $ 2,143 |

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- Definition Marketable securities maturity in years. + References No definition available. + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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