XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Short-term and Long-term debt - Additional Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 02, 2022 | Mar. 31, 2024 | Mar. 31, 2023
Short-term and Long-term debt |  |  |
Repayment of debt |  |  | $ 3,263
Amortization of deferred finance costs |  | $ 57 | $ 268
Revolving credit facility Amendment |  |  |
Short-term and Long-term debt |  |  |
Debt instrument, basis spread on variable rate | 1.00% |  |
Additional interest percentage | 0.50% |  |
Revolving credit facility Amendment | FILO Tranche |  |  |
Short-term and Long-term debt |  |  |
Debt instrument, basis spread on variable rate | 1.00% |  |
Additional interest percentage | 0.50% |  |
Revolving credit facility Amendment | SOFR |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 1.00% |  |
Revolving credit facility Amendment | SOFR | FILO Tranche |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 1.00% |  |
Revolving credit facility Amendment | SOFR | SOFR FILO Tranche |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 7.50% |  |
Revolving credit facility Amendment | Prime commercial lending rate of Wells Fargo | FILO Tranche |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 6.50% |  |
Revolving Credit Facility |  |  |
Short-term and Long-term debt |  |  |
Deferred financing costs | $ 200 |  |
Term Loan Facility |  |  |
Short-term and Long-term debt |  |  |
Debt instrument loan amount | 85,000 |  |
Payment of term loan deferred financing costs | $ 4,300 |  |
Minimum | Revolving credit facility Amendment | SOFR |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 2.36% |  |
Minimum | Revolving credit facility Amendment | Prime commercial lending rate of Wells Fargo |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 1.25% |  |
Maximum | Revolving credit facility Amendment | SOFR |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 2.86% |  |
Maximum | Revolving credit facility Amendment | Prime commercial lending rate of Wells Fargo |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 1.75% |  |
Wells Fargo |  |  |
Short-term and Long-term debt |  |  |
Amount outstanding, letter of credit | $ 900 |  |
Deferred financing costs | $ 900 |  |
Line of credit facility term | 5 years |  |
Wells Fargo | FILO Tranche |  |  |
Short-term and Long-term debt |  |  |
Amount borrowed | $ 15,000 |  |
Wells Fargo | FCCR |  |  |
Short-term and Long-term debt |  |  |
Minimum aggregate undrawn loan availability | $ 11,250 |  |
Period for FCCR covenant | 12 months |  |
Wells Fargo | Revolving credit facility Amendment |  |  |
Short-term and Long-term debt |  |  |
Maximum borrowing capacity | $ 75,000 |  |
Wells Fargo | Swing line loan |  |  |
Short-term and Long-term debt |  |  |
Maximum borrowing capacity | 9,000 |  |
Wells Fargo | Letter of credit |  |  |
Short-term and Long-term debt |  |  |
Maximum borrowing capacity | $ 2,000 |  |
Wells Fargo | Revolving Credit Facility | FCCR |  |  |
Short-term and Long-term debt |  |  |
Period for FCCR covenant | 2 months |  |
Wells Fargo | Minimum |  |  |
Short-term and Long-term debt |  |  |
Minimum liquidity requirement | $ 5,000 |  |
Minimum amount to be derived from availability | $ 3,000 |  |
Wells Fargo | Minimum | FCCR |  |  |
Short-term and Long-term debt |  |  |
Fixed charges coverage ratio | 1.00 |  |
Wells Fargo | Minimum | Revolving credit facility Amendment |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 0.35% |  |
Wells Fargo | Maximum | Revolving credit facility Amendment |  |  |
Short-term and Long-term debt |  |  |
Additional interest percentage | 0.75% |  |
Wells Fargo | Maximum | Revolving Credit Facility |  |  |
Short-term and Long-term debt |  |  |
Amount borrowed | $ 75,000 |  |

X
- Definition Percentage points added to the calculated interest rate dependent on average quarterly undrawn availability. + References No definition available. + Details
Name: | hdsn_DebtInstrumentAdditionalPercentagePointsInterest
Namespace Prefix: | hdsn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fixed charge coverage ratio reported during the year. + References No definition available. + Details
Name: | hdsn_FixedChargesCoverageRatio
Namespace Prefix: | hdsn_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum amount from availability. + References No definition available. + Details
Name: | hdsn_LineOfCreditFacilityCovenantComplianceMinimumLiquidity
Namespace Prefix: | hdsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the minimum amount to be derived from availability. + References No definition available. + Details
Name: | hdsn_LineOfCreditFacilityCovenantComplianceMinimumLiquidityToBeDerivedFromAvailability
Namespace Prefix: | hdsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum aggregate undrawn term loan availability used to determine percentage of excess cash flow to be used to paydown the loan. + References No definition available. + Details
Name: | hdsn_MinimumAggregateUndrawnLoanAvailability
Namespace Prefix: | hdsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the period for FCCR covenant. + References No definition available. + Details
Name: | hdsn_PeriodForFixedChargeCoverageRatio
Namespace Prefix: | hdsn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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 No definition available. + Details
Name: | hdsn_ShortTermAndLongTermDebtLineItems
Namespace Prefix: | hdsn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_AmortizationOfFinancingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 340 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.A) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480341/340-10-S99-1 + Details
Name: | us-gaap_DeferredOfferingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 + Details
Name: | us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_CreditFacilityAxis=hdsn_RevolvingCreditFacilityAmendmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=hdsn_FirstInLastOutTrancheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=hdsn_SecuredOvernightFinancingRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=hdsn_SecuredOvernightFinancingRateAndFirstInLastOutTrancheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=hdsn_PrimeCommercialLendingRateOfWellsFargoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=hdsn_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=hdsn_WellsFargoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=hdsn_FCCRMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=hdsn_SwingLineLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |