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Segment, Customer and Geographical Reporting (Details 1) (USD $)
 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 9,611,000us-gaap_SalesRevenueNet $ 10,712,000us-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 7,682,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember		 8,908,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember
% of Total 80.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember		 83.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= dysl_UnitedStateMember
Europe [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 884,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		 830,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
% of Total 9.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		 8.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Other [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 1,045,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember		 $ 974,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember
% of Total 11.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember		 9.00%dysl_PercentageOfTotalRevenue
/ us-gaap_StatementGeographicalAxis
= us-gaap_OtherCreditDerivativesMember