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Note 4 - Leases (Details Textual) ft² in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 25, 2021 USD ($) ft² | Dec. 25, 2021 USD ($) ft²
Norton Facility [Member] |  |
Area of Real Estate Property (Square Foot) | ft² | 38 | 38
Norton Facility [Member] | Minimum [Member] |  |
Lessee, Operating Lease, Monthly Rent Payments | $ 13 | $ 13
Norton Facility [Member] | Maximum [Member] |  |
Lessee, Operating Lease, Monthly Rent Payments | $ 14 | $ 14
Facility Two [Member] | Lease Expiration, December 2020 [Member] |  |
Operating Lease, Real Estate, Number of Leases | 1 | 1
Norton Facility [Member] |  |
Operating Lease, Expense | $ 38 |
Operating Lease, Payments |  | $ 152

X
- Definition The amount of monthly rent payments for lessee under operating lease. + References No definition available. + Details
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Namespace Prefix: | cpsh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of real estate operating leases. + References No definition available. + Details
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Namespace Prefix: | cpsh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
Name: | us-gaap_OperatingLeasePayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=cpsh_NortonFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |