Name:	daio_WeightedAverageRemainingLeaseTerm
Namespace Prefix:	daio_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Area of land held.

No definition available.

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

No definition available.

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Weighted average discount rate for operating lease calculated at point in time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Cash payments to lessor's for use of assets under operating leases.

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-Name Accounting Standards Codification
-Topic 230
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-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585

Name:	us-gaap_PaymentsForRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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-Publisher FASB
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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