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Schedule of Warranty Reserves (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 28, 2025 | Sep. 29, 2024
Accounting Policies [Abstract] |  |  |
Beginning balance |  | $ 52 | $ 75
Incurred costs for warranties satisfied during the period |  |  | (52)
Warranties reserved for new product shipped during the period | [1] | 152 | 106
Change in estimate for pre-existing warranty liabilities | [2] | (42) | (77)
Warranty Expense |  | 110 | 29
Ending balance |  | $ 162 | $ 52
[1] | Warranty expenses accrued to cost of sales for shipped optical assemblies of $9 thousand (based on prior three months shipments of optical assemblies and the optical assembly historical warranty return rate) in addition to an expected warranty repair cost of $143 thousand for shipped day windows due to a glass cracking issue.
[2] | Changes in estimated warranty liabilities recognized in cost of sales associated with: the period end customer returned warranty backlog, or the actual costs of repaired/replaced warranty units which were shipped to the customer during the year. During the twelve months ended September 28, 2025, the warranty return rate was below historical levels resulting in a favorable change in estimate during the period.

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- Definition Product warranty accrual reserved for new product shipping. + References No definition available. + Details
Name: | OPXS_ProductWarrantyAccrualReservedForNewProductShipping
Namespace Prefix: | OPXS_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of warranty costs incurred during the period. + References No definition available. + Details
Name: | OPXS_ProductWarrantyAccrualWarrantyCosts
Namespace Prefix: | OPXS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Warranty reserve + References No definition available. + Details
Name: | OPXS_WarrantyReserve
Namespace Prefix: | OPXS_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of increase (decrease) in the standard and extended product warranty liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
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- Definition Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration