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INCOME TAXES (Details Narrative) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
INCOME TAXES (Details Narrative)
Reduction in deferred tax assets and valuation allowance	$ 381,000	$ 370,000
Valuation allowance, net	$ 8,000,000.0

X

- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

No definition available.

+ Details

Name:	daio_ValuationAllowanceNet
Namespace Prefix:	daio_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

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Period Type:	duration