Actual amount of purchases under purchase amendment during the reporting period.

No definition available.

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

- Definition

Refer cost to terminate lease, as on date.

+ References

No definition available.

+ Details

Name:	cthr_CostToTerminateLease
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	cthr_LeaseCommitmentsAbstract
Namespace Prefix:	cthr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Additions or improvements to assets held under a lease arrangement offered by land lord.

+ References

No definition available.

+ Details

Name:	cthr_LeaseholdImprovementsOfferedByLandlord
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Expenses related to lease signing and moving incentives to assets held under a lease arrangement offered by landlord.

+ References

No definition available.

+ Details

Name:	cthr_LeaseSigningAndMovingIncentivesOfferedByLandlord
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Refer to maximum purchase commitment in initial new order.

+ References

No definition available.

+ Details

Name:	cthr_MaximumPurchaseCommitmentInInitialNewOrder
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Refer to maximum purchase commitment under the amendment including the initial new order, is dependent upon the grade of the material.

+ References

No definition available.

+ Details

Name:	cthr_MaximumPurchaseCommitmentUnderAmendment
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Refer to minimum purchase commitment in initial new order.

+ References

No definition available.

+ Details

Name:	cthr_MinimumPurchaseCommitmentInInitialNewOrder
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Refer to minimum purchase commitment under the amendment including the initial new order, is dependent upon the grade of the material.

+ References

No definition available.

+ Details

Name:	cthr_MinimumPurchaseCommitmentUnderAmendment
Namespace Prefix:	cthr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of months rent included in the costs to terminate the lease.

+ References

No definition available.

+ Details

Name:	cthr_NumberOfMonthsIncludedInCostsToTerminateLease
Namespace Prefix:	cthr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of options to unilaterally extend the term.

+ References

No definition available.

+ Details

Name:	cthr_NumberOfOptionToUnilaterallyExtendTheTerm
Namespace Prefix:	cthr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage committed to be purchased.

+ References

No definition available.

+ Details

Name:	cthr_PercentageCommittedToBePurchased
Namespace Prefix:	cthr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period for which rent is abated.

+ References

No definition available.

+ Details

Name:	cthr_PeriodForWhichRentIsAbated
Namespace Prefix:	cthr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period of exclusive supply agreement.

+ References

No definition available.

+ Details

Name:	cthr_PeriodOfExclusiveSupplyAgreement
Namespace Prefix:	cthr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period of lease.

+ References

No definition available.

+ Details

Name:	cthr_PeriodOfLease
Namespace Prefix:	cthr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	cthr_PurchaseCommitmentsAbstract
Namespace Prefix:	cthr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of land subject to a ground lease.

+ References

No definition available.

+ Details

Name:	us-gaap_LandSubjectToGroundLeases
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

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

- Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

COMMITMENTS AND CONTINGENCIES (Details) (USD $)	0 Months Ended		3 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) (USD $)	Dec. 12, 2014 Option	Dec. 09, 2013 sqft	Mar. 31, 2015 sqft	Mar. 31, 2014	Dec. 12, 2014	May 23, 2014	Oct. 31, 2013
Lease Commitments [Abstract]
Period of lease			7 years
Land subject to leases (in square feet)		36,350us-gaap_LandSubjectToGroundLeases	16,500us-gaap_LandSubjectToGroundLeases
Number of months included in costs to terminate lease			2 months
Cost to terminate lease							$ 112,000cthr_CostToTerminateLease
Leasehold improvements offered by landlord						550,000
Lease signing and moving incentives offered by landlord						73,000
Period for which rent is abated		7 months
Future minimum payments under operating lease [Abstract]
2015			417,615
2016			569,138
2017			584,789
2018			600,871
2019			617,395
Thereafter			1,176,330
Total			3,966,138
Rent expense			128,000us-gaap_LeaseAndRentalExpense	31,000us-gaap_LeaseAndRentalExpense
Purchase Commitments [Abstract]
Period of exclusive supply agreement	2 years		10 years
Percentage committed to be purchased (in hundredths)	100.00%cthr_PercentageCommittedToBePurchased		50.00%cthr_PercentageCommittedToBePurchased
Number of option to unilaterally extend the term	1
Minimum purchase commitment in initial new order			4,000,000		29,600,000
Maximum purchase commitment in initial new order					31,500,000
Minimum purchase commitment under the amendment			7,640,000
Maximum purchase commitment under amendment			18,560,000
Actual purchases under purchase amendment			$ 1,440,000	$ 2,550,000