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Summary of Significant Accounting Policies - Revenue by product families (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenues: (in thousands) | $ 13,564,764 | $ 17,510,780 | $ 13,498,196
Mobile handheld computer and related product and service |  |  |
Revenues: (in thousands) | 7,186 | 11,345 | 9,840
Cordless barcode scanning and related product and service |  |  |
Revenues: (in thousands) | 5,371 | 5,983 | 2,038
Other |  |  |
Revenues: (in thousands) | $ 396 | $ 795 | $ 1,620

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration