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CONCENTRATION OF RISK, Long-Lived Assets by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 supplier | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |
Total long-lived assets | 20,485 us-gaap_NoncurrentAssets | $ 19,922 us-gaap_NoncurrentAssets
Supplier Concentration Risk [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of suppliers from which chemical materials were purchased | 1 oled_NumberOfSuppliersFromWhichChemicalMaterialsWerePurchased / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember |
UNITED STATES |  |
Segment Reporting Information [Line Items] |  |
Total long-lived assets | 20,347 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US | 19,763 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Total long-lived assets | 138 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AllOtherSegmentsMember | $ 159 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AllOtherSegmentsMember

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- Definition The number of suppliers from which all chemical materials were purchased. + References No definition available. + Details
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Period Type: | duration

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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Namespace Prefix: |
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- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
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Period Type: |

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- Details
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