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NOTE 10 - STOCK AND RETIREMENT PLANS (Details Narrative) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Note 10 - Stock And Retirement Plans Details Narrative |  |
401(k) Retirement Savings Plan matching contribution | $ 173us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | $ 157us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount

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- Details
Name: | DAIO_Note11StockAndRetirementPlansDetailsNarrativeAbstract
Namespace Prefix: | DAIO_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration