XML 75 R64.htm IDEA: XBRL DOCUMENT
v3.25.3

Note Q - Leases (Details Textual) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Sep. 28, 2025 | Mar. 31, 2025
Operating Lease Payments, Net Sublease Income | $ 920 |
Operating Lease, Liability, Current | 1,933 | $ 1,923
Operating Lease, Liability, Noncurrent | $ 2,631 | $ 3,528

X
- Definition The amount of cash outflow for operating leases, net cash inflow for sublease income. + References No definition available. + Details
Name: | nath_OperatingLeasePaymentsNetSubleaseIncome
Namespace Prefix: | nath_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant