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Investments and Fair Value Measurements - FV Measurements (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Assets, Fair Value Disclosure [Abstract] |  |
Available-for-sale Securities | $ 43,331 | $ 44,003
Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total | 18,264 | 19,128
Liabilities [Abstract] |  |
Foreign currency hedge obligations | 8 | 36
Recurring [Member] | Certificates of Deposit [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash and cash equivalents, fair value disclosure | 9,088 | 9,783
Recurring [Member] | Corporate Bonds [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Available-for-sale Securities | 8,643 | 8,713
Recurring [Member] | Corporate Equity Securities [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Available-for-sale Securities | 533 | 632
Recurring [Member] | Quoted Prices in Active Markets of Identical Assets (Level 1) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total | 533 | 632
Recurring [Member] | Quoted Prices in Active Markets of Identical Assets (Level 1) [Member] | Corporate Equity Securities [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Available-for-sale Securities | 533 | 632
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total | 17,731 | 18,496
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Certificates of Deposit [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash and cash equivalents, fair value disclosure | 9,088 | 9,783
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Bonds [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Available-for-sale Securities | 8,643 | 8,713
Recurring [Member] | Significant Other Observable Inputs (Level 3) [Member] |  |
Liabilities [Abstract] |  |
Foreign currency hedge obligations | $ 8 | $ 36

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + 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=51813488&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=49167202&loc=d3e26610-111562 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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