Class of Warrant or Right, Exercised

No definition available.

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Namespace Prefix:	chrn_
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Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

+ Details

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Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

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

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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Warrants - Additional Information (Details) - $ / shares shares in Thousands		1 Months Ended
	May 11, 2026	May 31, 2026	May 05, 2026	Jan. 31, 2026	Jan. 22, 2026	Oct. 31, 2025	May 31, 2025	Mar. 31, 2025	Sep. 30, 2024
Class of Warrant or Right [Line Items]
Exercised (in shares)	700	700
Warrants, exercise price (in dollars per share)		$ 9.19
Warrants outstanding (in shares)		458	1,158
January 2026 Private Placement Warrants
Class of Warrant or Right [Line Items]
Exercised (in shares)		0
Warrants, exercise price (in dollars per share)		$ 8.22		$ 8.22
Warrants issued to purchase of common stock (in shares)				356
Warrants outstanding (in shares)		356	356
January 2026 Placement Agent Warrant
Class of Warrant or Right [Line Items]
Exercised (in shares)		0
Warrants, exercise price (in dollars per share)		$ 8.22			$ 8.22
Warrants issued to purchase of common stock (in shares)					14
Warrants outstanding (in shares)		14	14
October 2025 Placement Agent Warrant
Class of Warrant or Right [Line Items]
Exercised (in shares)		0
Warrants, exercise price (in dollars per share)		$ 4.81				$ 4.81
Warrants issued to purchase of common stock (in shares)						15
Warrants outstanding (in shares)		15	15
March 2025 Inducement Warrant
Class of Warrant or Right [Line Items]
Exercised (in shares)		700
Warrants, exercise price (in dollars per share)		$ 6.36						$ 6.36
Warrants issued to purchase of common stock (in shares)								700
Warrants outstanding (in shares)		0	700
September 2024 Series A Warrants
Class of Warrant or Right [Line Items]
Exercised (in shares)		0
Warrants, exercise price (in dollars per share)		$ 15.00							$ 15.00
Warrants issued to purchase of common stock (in shares)									400
Warrants outstanding (in shares)		73	73				73