Retirement Plans (Details 5)	Sep. 30, 2013	Sep. 30, 2012
Retirement Plans [Line Items]
Discount rate	4.75%	3.75%
Expected return on plan assets	2.60%	2.60%
Rate of compensation increase	0.00%	0.00%

It represents defined benefit plan assumptions used for calculating benefit obligation expected return on plan assets during the year ending.

No definition available.

+ Details

Name:	dysl_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedReturnOnPlanAssets
Namespace Prefix:	dysl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dysl_RetirementPlansLineItems
Namespace Prefix:	dysl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(2)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant