Quarterly report pursuant to Section 13 or 15(d)

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Accounting Policies
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Notes Details

Note F - Debt (Details Textual)

v3.20.4

Note F - Debt (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Note F - Debt (Details Textual) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019	Oct. 03, 2020	Aug. 28, 2020	Jan. 02, 2020	Nov. 19, 2019	Jan. 02, 2019	Oct. 08, 2018
Repayments of Long-term Debt, Total	$ 112,557	$ 105,211
Promissory Note [Member]
Debt Instrument, Face Amount								$ 7,000
Debt Instrument, Interest Rate, Stated Percentage							6.00%
Debt Instrument Discounted Value					$ 2,300
Term Loan Established December 2020 [Member] \| Banco Ficohsa [Member]
Debt Instrument, Term (Year)	5 years
Repayments of Long-term Debt, Total	$ 1,100
Revolving Credit Facility [Member] \| Line of Credit [Member] \| Banco Ficohsa [Member]
Debt Instrument, Term (Year)	5 years
Repayments of Long-term Debt, Total	$ 9,500
Amended Credit Agreement [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 170,000
Line Of Credit Facility Maximum Capacity For Capital Leases				$ 25,000
Line of Credit Facility Including Additional Borrowing Capacity Maximum				$ 200,000
Long-term Line of Credit, Total	$ 107,100
Line of Credit Facility, Interest Rate During Period	3.40%
Line of Credit Facility, Remaining Borrowing Capacity	$ 43,700
Amended Credit Agreement [Member] \| Letter of Credit [Member]
Retained Earnings Amount Available For Dividends And Stock Repurchases	$ 9,200		$ 8,800

- Definition

Represents the discounted value of debt instrument.

+ References

No definition available.

+ Details

Name:	dla_DebtInstrumentDiscountedValue
Namespace Prefix:	dla_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	dla_LineOfCreditFacilityIncludingAdditionalBorrowingCapacityMaximum
Namespace Prefix:	dla_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents line of credit maximum capacity for capital lease.

+ References

No definition available.

+ Details

Name:	dla_LineOfCreditFacilityMaximumCapacityForCapitalLeases
Namespace Prefix:	dla_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents retained earnings amount available for dividends and stock repurchases.

+ References

No definition available.

+ Details

Name:	dla_RetainedEarningsAmountAvailableForDividendsAndStockRepurchases
Namespace Prefix:	dla_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(16))
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 944
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-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

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

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
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+ Details

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Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

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- Details

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