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Segment, Customer and Geographical Reporting (Details Textual)
 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Segment Reporting [Line Items]    
Concentration Risk, Percentage 39.50%us-gaap_ConcentrationRiskPercentage1 42.30%us-gaap_ConcentrationRiskPercentage1
Optics [Member]    
Segment Reporting [Line Items]    
Concentration Risk, Percentage 11.10%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_StatementBusinessSegmentsAxis
= dysl_ProductsAndTechnologySegmentMember		 4.80%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_StatementBusinessSegmentsAxis
= dysl_ProductsAndTechnologySegmentMember
Instrument Segment [Member] | Customer One [Member]    
Segment Reporting [Line Items]    
Concentration Risk, Percentage 9.50%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dysl_CustomerOneMember
/ us-gaap_StatementBusinessSegmentsAxis
= dysl_InstrumentSegmentMember		 18.10%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dysl_CustomerOneMember
/ us-gaap_StatementBusinessSegmentsAxis
= dysl_InstrumentSegmentMember
Biomedical Technologies [Member] | Customer One [Member]    
Segment Reporting [Line Items]    
Concentration Risk, Percentage 100.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dysl_CustomerOneMember
/ us-gaap_StatementBusinessSegmentsAxis
= dysl_BiomedicalTechnologiesMember		 100.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dysl_CustomerOneMember
/ us-gaap_StatementBusinessSegmentsAxis
= dysl_BiomedicalTechnologiesMember
Customer Concentration Risk [Member]    
Segment Reporting [Line Items]    
Concentration Risk, Percentage 68.90%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember		 57.30%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember