SIGNIFICANT ACCOUNTING POLICIES, Going Concern Considerations (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2023	Sep. 30, 2022
Forecast [Member]
Credit Agreement [Abstract]
Covenant amount, revenue	$ 50.1	$ 45.6

The Credit Agreement contains financial covenants requiring that the Company maintain revenue amounts for four rolling quarters.

No definition available.

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