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Subsequent Events (Details) - USD ($) $ in Millions	Oct. 31, 2024	Oct. 23, 2024	Aug. 31, 2024
Subsequent Event [Line Items]
Repurchase of amount authorized			$ 10
Subsequent Events
Subsequent Event [Line Items]
Repurchase of amount authorized	$ 20
Amount authorized for purchase of share	$ 10
Subsequent Events | Wells Fargo | Second Amendment
Subsequent Event [Line Items]
Stock repurchase amount		$ 10
Maximum amount of shares repurchased		5
Maximum shares repurchase amount		$ 25

X

- Definition

Maximum amount of shares that can be repurchased by the company over the term of credit facility as per the covenant terms mentioned in the amendment.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

Maximum amount of shares that can be repurchased by the company per calendar year after first fiscal year following the current fiscal year as per the covenant's terms mentioned in the amendment.

+ References

No definition available.

+ Details

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Namespace Prefix:	hdsn_
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X

- Definition

Maximum amount of shares that can be repurchased by the company per calendar year as per the covenant's terms mentioned in the amendment.

+ References

No definition available.

+ Details

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Namespace Prefix:	hdsn_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount authorized for purchase of share in each calendar year under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

X

- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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X

- Details

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X

- Details

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X

- Details

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