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NOTE 13 - SEGMENT AND GEOGRAPHIC INFORMATION (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Net sales: $ 21,924us-gaap_Revenues $ 18,717us-gaap_Revenues
Operating income (loss): 1,107us-gaap_OperatingIncomeLoss (2,668)us-gaap_OperatingIncomeLoss
Identifiable assets: 19,332us-gaap_Assets 17,502us-gaap_Assets
US    
Net sales: 2,104us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_USAMember
2,331us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_USAMember
Operating income (loss): 284us-gaap_OperatingIncomeLoss
/ us-gaap_StatementGeographicalAxis
= DAIO_USAMember
(1,595)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementGeographicalAxis
= DAIO_USAMember
Identifiable assets: 7,215us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= DAIO_USAMember
6,229us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= DAIO_USAMember
Europe    
Net sales: 8,596us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
5,578us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Operating income (loss): 274us-gaap_OperatingIncomeLoss
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
(930)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Identifiable assets: 3,689us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
3,701us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Rest Of World    
Net sales: 11,224us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_RestOfWorldMember
10,808us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_RestOfWorldMember
Operating income (loss): 549us-gaap_OperatingIncomeLoss
/ us-gaap_StatementGeographicalAxis
= DAIO_RestOfWorldMember
(143)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementGeographicalAxis
= DAIO_RestOfWorldMember
Identifiable assets: 8,428us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= DAIO_RestOfWorldMember
7,572us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= DAIO_RestOfWorldMember
Germany    
Net sales: 4,856us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_GermanyMember
3,305us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_GermanyMember
China    
Net sales: $ 2,733us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_ChinaMember
$ 3,041us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= DAIO_ChinaMember