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Investments and Fair Value Measurements, Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Cash Equivalents and Investments [Abstract] |  |  |
Money market fund |  | $ 0 | $ 23
Certificates of deposit | [1] | 11,303 | 6,454
Recurring [Member] |  |  |
Cash Equivalents and Investments [Abstract] |  |  |
Money market fund |  |  | 23
Certificates of deposit |  | 19,393 | 10,183
Corporate bonds |  | 8,966 | 9,186
Corporate equity securities |  | 575 | 754
Total |  | 28,934 | 20,146
Liabilities [Abstract] |  |  |
Liabilities |  |  | 0
Foreign currency hedge obligations |  | 29 |
Recurring [Member] | Quoted Prices in Active Markets of Identical Assets (Level 1) [Member] |  |  |
Cash Equivalents and Investments [Abstract] |  |  |
Money market fund |  |  | 23
Certificates of deposit |  | 0 | 0
Corporate bonds |  | 0 | 0
Corporate equity securities |  | 575 | 754
Total |  | 575 | 777
Liabilities [Abstract] |  |  |
Liabilities |  |  | 0
Foreign currency hedge obligations |  | 0 |
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |  |
Cash Equivalents and Investments [Abstract] |  |  |
Money market fund |  |  | 0
Certificates of deposit |  | 19,393 | 10,183
Corporate bonds |  | 8,966 | 9,186
Corporate equity securities |  | 0 | 0
Total |  | 28,359 | 19,369
Liabilities [Abstract] |  |  |
Liabilities |  |  | 0
Foreign currency hedge obligations |  | 0 |
Recurring [Member] | Significant Other Observable Inputs (Level 3) [Member] |  |  |
Cash Equivalents and Investments [Abstract] |  |  |
Money market fund |  |  | 0
Certificates of deposit |  | 0 | 0
Corporate bonds |  | 0 | 0
Corporate equity securities |  | 0 | 0
Total |  | 0 | 0
Liabilities [Abstract] |  |  |
Liabilities |  |  | $ 0
Foreign currency hedge obligations |  | $ 29 |
[1] | Certificate of deposit with original maturities of less than 90 days.

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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 A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fair value as of the balance sheet date of firm holdings in fixed income or other debt securities issued by a corporation or other issuer not elsewhere specified in the taxonomy. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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- Definition The fair value as of the balance sheet date of firm holdings in corporate stocks (common and preferred), stock options, warrants and any other financial instrument which represents, or provides the ability to obtain, ownership rights in a corporation. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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- Definition Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into. + References No definition available. + Details
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- Definition Fair value of financial and nonfinancial obligations. + 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 Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: 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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