XML 11 R48.htm IDEA: XBRL DOCUMENT
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NOTE 11 - STOCK AND RETIREMENT PLANS (Details) (USD $) | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2012 | Jan. 31, 2012 OneMillionProgramMember | Dec. 31, 2011 OneMillionProgramMember | Nov. 30, 2011 OneMillionProgramMember | Mar. 31, 2012 SixMillionProgramMember | Feb. 29, 2012 SixMillionProgramMember | Jan. 31, 2012 SixMillionProgramMember
Total Number of Shares Purchased | 1,545,705 | 10,581 | 30,848 | 32,068 | 1,056,514 | 243,862 | 171,832
Average Price Paid per Share | $ 4.02 | $ 3.90 | $ 4.07 | $ 3.88 | $ 3.95 | $ 4.25 | $ 4.18
Total Number of Shares Purchased as Part of Publicly Announced Repurchase Program | 1,545,705 | 10,581 | 30,848 | 32,068 | 1,056,514 | 243,862 | 171,832
Approximate Dollar Value of Shares that May Yet Be Purchased under the Program |  | $ 0 | $ 747,463 | $ 874,328 | $ 0 | $ 4,228,920 | $ 5,274,294

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- Definition Custom Element. + References No definition available. + Details
Name: | DAIO_ApproximateDollarValueOfSharesThatMayYetBePurchasedUnderProgram
Namespace Prefix: | DAIO_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Custom Element. + References No definition available. + Details
Name: | DAIO_AveragePricePaidPerShareForShareRepurchase
Namespace Prefix: | DAIO_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Custom Element. + References No definition available. + Details
Name: | DAIO_TotalNumberOfSharesPurchasedAsPartOfPubliclyAnnouncedRepurchaseProgram
Namespace Prefix: | DAIO_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration