COMMITMENTS, CONTINGENCIES, AND CONCENTRATIONS, Employment Contracts (Details)	9 Months Ended
Sep. 30, 2022 USD ($) KeyEmployee
Employment Contracts [Abstract]
Number of key employees with whom Company has employment contracts \| KeyEmployee	3
Aggregate annual salaries of employment contracts	$ 1,178,000
Contract one, expiration date	Dec. 31, 2022
Contract two expiration date	Dec. 31, 2024
Future minimum salary commitments [Abstract]
2022	$ 294,500
2023	383,000
2024	$ 383,000

Aggregate amount of annual salaries called for by the employment contracts.

No definition available.

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Namespace Prefix:	cemi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Refers to the expiration date of contract one.

+ References

No definition available.

+ Details

Name:	cemi_ContractOneExpirationDate
Namespace Prefix:	cemi_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to the expiration date of contract two.

+ References

No definition available.

+ Details

Name:	cemi_ContractTwoExpirationDate
Namespace Prefix:	cemi_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	cemi_EmploymentContractsAbstract
Namespace Prefix:	cemi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of key employees with whom the Company has employment contracts.

+ References

No definition available.

+ Details

Name:	cemi_NumberOfKeyEmployeesWithWhomCompanyHasEmploymentContracts
Namespace Prefix:	cemi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of commitment classified as other to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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

- Definition

Amount of commitment classified as other to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount of commitment classified as other to be paid in remainder of current fiscal year.

+ References

No definition available.

+ Details

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