XML 58 R43.htm IDEA: XBRL DOCUMENT
v3.21.1

Note D - Leases (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019 | Jan. 01, 2019
Operating Lease, Right-of-Use Asset | $ 23,793 |  | $ 17,679 |
Lessee, Lease, Termination Period (Year) | 1 year |  |  |
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total | $ 957 |  | 1,138 |
Finance Lease, Right-of-Use Asset, Accumulated Depreciation | $ 500 |  | $ 400 |
Minimum [Member] |  |  |  |
Lessee, Lease Remaining Lease Term (Year) | 1 year |  |  |
Minimum [Member] | Sublease Fullerton, Jacksonville and Manila Facilities [Member] |  |  |  |
Lessee, Operating Sublease, Lease Term (Month) | 150 days |  |  |
Maximum [Member] |  |  |  |
Lessee, Lease Remaining Lease Term (Year) | 6 years |  |  |
Lessee, Lease, Renewal Term (Year) | 5 years |  |  |
Maximum [Member] | Sublease Fullerton, Jacksonville and Manila Facilities [Member] |  |  |  |
Lessee, Operating Sublease, Lease Term (Month) | 2 years 330 days |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |
Operating Lease, Right-of-Use Asset |  | $ 22,800 |  |
Operating Lease, Liability, Total |  |  |  | $ 23,900

X
- Definition The amount of accumulated depreciation for right-of-use asset under finance lease. + References No definition available. + Details
Name: | hrth_FinanceLeaseRightofUseAssetAccumulatedDepreciation
Namespace Prefix: | hrth_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The remaining lease term for leases of the lessee. + References No definition available. + Details
Name: | hrth_LesseeLeaseRemainingLeaseTerm
Namespace Prefix: | hrth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The renewal term for leases of the lessee. + References No definition available. + Details
Name: | hrth_LesseeLeaseRenewalTerm
Namespace Prefix: | hrth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The termination period for leases of the lessee. + References No definition available. + Details
Name: | hrth_LesseeLeaseTerminationPeriod
Namespace Prefix: | hrth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of operating sublease. + References No definition available. + Details
Name: | hrth_LesseeOperatingSubleaseLeaseTerm
Namespace Prefix: | hrth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=hrth_SubleaseFullertonJacksonvilleAndManilaFacilitiesMember
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_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |