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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

Name:	cpsh_LesseeOperatingLeaseMonthlyRentPayments
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

Name:	cpsh_OperatingLeaseRealEstateNumberOfLeases
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

Name:	us-gaap_OperatingLeaseExpense
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

Name:	us-gaap_LeaseContractualTermAxis=cpsh_NortonFacilityMember
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

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=cpsh_FacilityTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LeaseContractualTermAxis=cpsh_LeaseExpirationDecember2020Member
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: