Represents the minimum value of share to be purchased by an employee in an calendar year.

No definition available.

Name:	dysl_MinimumStockValueToBePurchasedUnderPlanPerEmployee
Namespace Prefix:	dysl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the maturity period of option fair value exercisable.

+ References

No definition available.

+ Details

Name:	dysl_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsFairValueExercisableMaturityPeriod
Namespace Prefix:	dysl_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

Name:	us-gaap_CommonStockSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

+ Details

Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

+ Details

Name:	us-gaap_CommonStockValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_ConversionOfStockSharesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Existence and nature of any repurchase obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

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

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AwardDateAxis=dysl_Amendmend2010September28Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=dysl_Amendment2011December16Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=dysl_EmployeeStockPurchasePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=dysl_StockIncentivePlan2010Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stockholders' Equity (Details Textual) (USD $)	12 Months Ended
Stockholders' Equity (Details Textual) (USD $)	Sep. 30, 2014	Sep. 30, 2010	Sep. 30, 2013
Class of Stock [Line Items]
Common Stock, Shares, Issued	17,140,182us-gaap_CommonStockSharesIssued		16,224,402us-gaap_CommonStockSharesIssued
Common Stock, Value, Issued	$ 9,000us-gaap_CommonStockValue		8,000us-gaap_CommonStockValue
Common Stock, Shares Authorized	40,000,000us-gaap_CommonStockSharesAuthorized		40,000,000us-gaap_CommonStockSharesAuthorized
Employee Stock Ownership Plan (ESOP), Terms of Repurchase Obligation		Company adopted an Amended and Restated Employee Stock Purchase Plan. The existing plan was amended to extend the termination date to September 28, 2020. The Employee Stock Purchase Plan permits substantially all employees to purchase common stock at a purchase price of 85% of the fair market value of the shares
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	22,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	0		0
Amendmend 2010 September 28 [Member]
Class of Stock [Line Items]
Minimum Stock Value To Be Purchased Under Plan Per Employee	20,000
Amendment 2011 December 16 [Member]
Class of Stock [Line Items]
Minimum Stock Value To Be Purchased Under Plan Per Employee	5,000
Stock Incentive Plan 2010 [Member]
Class of Stock [Line Items]
Common Stock, Shares Authorized	6,000,000
Common Stock, Capital Shares Reserved for Future Issuance	3,862,843		3,868,124
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value Exercisable, Maturity Period	2017
Employee Stock Purchase Plan [Member] \| Amendmend 2010 September 28 [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Issued	154,643		284,858
Common Stock, Capital Shares Reserved for Future Issuance	450,000
Employee Stock Purchase Plan [Member] \| Amendment 2011 December 16 [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued	10,499		28,622
Common Stock, Value, Issued	$ 13,345		20,335