Allowance for doubtful accounts receivable from suppliers.

No definition available.

Name:	jrsh_AllowanceForDoubtfulAccountsReceivableFromSuppliers
Namespace Prefix:	jrsh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Income tax, description.

+ References

No definition available.

+ Details

Name:	jrsh_IncomeTaxDescription
Namespace Prefix:	jrsh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Income tax realized percentage.

+ References

No definition available.

+ Details

Name:	jrsh_IncomeTaxRealizedPercentage
Namespace Prefix:	jrsh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	jrsh_NetAssetVariableInterestEntityDescritpion
Namespace Prefix:	jrsh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	jrsh_NumberOfCustomer
Namespace Prefix:	jrsh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	jrsh_NumberOfSupplier
Namespace Prefix:	jrsh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	jrsh_SummaryOfSignificantAccountingPoliciesTextualAbstract
Namespace Prefix:	jrsh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446

+ Details

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

- Definition

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

+ Details

Name:	us-gaap_CashFDICInsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

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

- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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

- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_OwnershipAxis=jrsh_WealthChoiceLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_CN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_HK
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_JO
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_SupplierOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_SupplierTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_RevenueFromContractWithCustomerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_CustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_CustomerTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_CustomerThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_CustomerFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=jrsh_AccountPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=jrsh_SupplierThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ShippingAndHandlingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) Customer Supplier	Jun. 30, 2019 USD ($) Supplier	Mar. 31, 2020 USD ($) Customer Supplier	Mar. 31, 2019 Customer
Summary of Significant Accounting Policies (Textual)
Revenue recognized
Number of supplier \| Supplier	2	2
Cost of goods sold	$ 15,655,185	$ 18,014,622
Income tax, description	In accordance with the Investment Encouragement Law, Jerash Garments' export sales to overseas customers were entitled to a 100% income tax exemption for a period of 10 years commencing at the first day of production. This exemption had been extended for five years until December 31, 2018. Effective January 1, 2019, the Jordanian government changed some features of its tax incentive programs and Jerash Garments and its subsidiaries and VIE are now qualified for incentives applicable to a Development Zone, a change from the previous incentive program relating to Qualifying Industrial Zone. In accordance with Development Zone law, Jerash Garments and its subsidiaries and VIE were subject to corporate income tax in Jordan at a rate of 10% plus 1% social contribution. Effective January 1, 2020, income rate increased to 14% plus 1% social contribution.
FDIC insured amount	$ 250,000
Income tax realized percentage	50.00%
Corporate income tax rate	14.00%
Local sales tax	16.00%
Allowance for accounts receivable	$ 22,312		$ 4,641
Allowance for advance to suppliers	$ (2,372)		(2,000)
Net asset variable interest entity, descritpion	The primary beneficiary is required to consolidate the VIE for financial reporting purposes. The Compay's VIE, Victory Apparel, was inactive for the three months ended June 30, 2020, and the net assets of the VIE were approximately $0.3 million as of each of June 30, 2020 and March 31, 2020.
Wealth Choice Limited [Member]
Summary of Significant Accounting Policies (Textual)
Ownership percentage by parent	100.00%
United States [Member]
Summary of Significant Accounting Policies (Textual)
FDIC insured amount	$ 91,785		48,386
China [Member]
Summary of Significant Accounting Policies (Textual)
Deposits	79,625		125,830
Hong Kong [Member]
Summary of Significant Accounting Policies (Textual)
Deposits	14,210,256		19,847,852
Jordan [Member]
Summary of Significant Accounting Policies (Textual)
Deposits	$ 4,159,305		$ 6,894,641
Supplier One [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	19.00%	29.00%
Supplier Two [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	10.00%	13.00%
Revenue From Contract With Customer [Member]
Summary of Significant Accounting Policies (Textual)
Number of customer \| Customer	1			1
Revenue From Contract With Customer [Member] \| Customer One [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	78.00%			97.00%
Accounts Receivable [Member]
Summary of Significant Accounting Policies (Textual)
Number of customer \| Customer	2		4
Accounts Receivable [Member] \| Customer One [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	74.00%		42.00%
Accounts Receivable [Member] \| Customer Two [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	11.00%		20.00%
Accounts Receivable [Member] \| Customer Three [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk			20.00%
Accounts Receivable [Member] \| Customer Four [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk			14.00%
Account Payable [Member]
Summary of Significant Accounting Policies (Textual)
Number of supplier \| Supplier	3		3
Account Payable [Member] \| Supplier One [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	45.00%		39.00%
Account Payable [Member] \| Supplier Two [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	15.00%		16.00%
Account Payable [Member] \| Supplier Three [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	14.00%		10.00%
Shipping and Handling [Member]
Summary of Significant Accounting Policies (Textual)
Cost of goods sold	$ 183,913	$ 208,782