Goodwill (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Sep. 30, 2014
Goodwill [Line Items]
Goodwill, Impairment Loss, before tax	$ 4.0dysl_GoodwillImpairmentLossBeforeTax
Goodwill [Member]
Goodwill [Line Items]
Other Asset Impairment Charges	$ 6.3
Hilger Crystals [Member]
Goodwill [Line Items]
Percentage Increase In Carrying Value Of Unit		20.00%
Weighted Average Cost Of Capital		16.00%
Long Term Growth Rate		5.00%
Radiation Monitoring Devices [Member]
Goodwill [Line Items]
Percentage Increase In Carrying Value Of Unit		20.00%
Weighted Average Cost Of Capital		13.00%
Long Term Growth Rate		2.50%

Represents the amount before income tax of goodwill impairment.

No definition available.

Name:	dysl_GoodwillImpairmentLossBeforeTax
Namespace Prefix:	dysl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the long term growth rate.

+ References

No definition available.

+ Details

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

- Definition

Represents the percentage by which the fair value exceeds the carrying value.

+ References

No definition available.

+ Details

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

- Definition

Represents the weighted average cost of capital of reporting unit as on the reporting date.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_GoodwillLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230

+ Details

Name:	us-gaap_OtherAssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_GoodwillMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=dysl_HilgerCrystalsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=dysl_RadiationMonitoringDevicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: