LONG-TERM DEBT (Details) - Note Payable - Equipment Vendor [Member] - USD ($)	1 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2020
Debt Instruments [Abstract]
Debt instrument, face amount	$ 660,000
Percentage of first payment of the term	30.00%
Percentage of second payment of the term	60.00%
Percentage of prepayment after delivery	10.00%
Percentage of first payment of the term by the vendor	15.00%
Percentage of second payment of the term by the vendor	40.00%
Percentage of payment after delivery by the vendor	10.00%
Annual interest rate	12.00%
Periodic payment debt instrument, principal and interest	$ 20,150
Term of debt instrument		24 months

Certain percentage portion of payment lent to entity by vendor after delivery of the equipment.

No definition available.

Name:	cemi_DebtInstrumentAfterDeliveryPercentageLentByVendor
Namespace Prefix:	cemi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Certain percentage portion of first payment lent to entity by vendor.

+ References

No definition available.

+ Details

Name:	cemi_DebtInstrumentFirstPaymentPercentageLentByVendor
Namespace Prefix:	cemi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of payment for the purchase of automated assembly equipment by the entity after delivery.

+ References

No definition available.

+ Details

Name:	cemi_DebtInstrumentPaymentAfterDeliveryPercentage
Namespace Prefix:	cemi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of payment down for the purchase of automated assembly equipment by the entity.

+ References

No definition available.

+ Details

Name:	cemi_DebtInstrumentPaymentDownPercentage
Namespace Prefix:	cemi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of payment for the purchase of automated assembly equipment by the entity at time of factory acceptance testing.

+ References

No definition available.

+ Details

Name:	cemi_DebtInstrumentPaymentFactoryAcceptanceTestingPercentage
Namespace Prefix:	cemi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Certain percentage portion of second payment lent to entity by vendor.

+ References

No definition available.

+ Details

Name:	cemi_DebtInstrumentSecondPaymentPercentageLentByVendor
Namespace Prefix:	cemi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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
-Publisher FASB
-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

The average effective interest rate during the reporting period.

+ 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ 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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=cemi_EquipmentVendorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: