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Segment, Customer and Geographical Reporting (Details 1) (USD $)
 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 42,309,000us-gaap_SalesRevenueNet $ 42,753,000us-gaap_SalesRevenueNet
% of Total 100.00%dysl_PercentageOfTotalRevenue 100.00%dysl_PercentageOfTotalRevenue
United State [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 33,936,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember		 35,018,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember
% of Total 80.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember		 82.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember
Europe [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 3,001,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		 3,719,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
% of Total 7.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		 9.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Other [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 5,372,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember		 $ 4,016,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember
% of Total 13.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember		 9.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember