BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, Advertising Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Advertising Costs [Abstract]
Cooperative advertising expenses	$ 606	$ 792
Advertising expenses	$ 7,890	$ 7,380

Expenses related to the cooperative advertising program offered to certain of its distributor and retail partners that reimburses, via a credit towards future purchases, a portion of their marketing costs based on the customers' net purchases from the Company and is subject to the customer providing documentation of all advertising performed that includes the Company's products.

No definition available.

Name:	cthr_CooperativeAdvertisingExpenses
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration