v3.26.3
Cover - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Aug. 31, 2026
Sep. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Mar. 31, 2026    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --03-31    
Entity File Number 000-56380    
Entity Registrant Name ZRCN Inc.    
Entity Central Index Key 0001901297    
Entity Tax Identification Number 83-2756695    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 1580 Dell Ave    
Entity Address, City or Town Campbell    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95008    
City Area Code (408)    
Local Phone Number 963-4550    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 0.3
Entity Common Stock, Shares Outstanding   10,360,924  
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 5036    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of ZRCN Inc. (the “Company”) as of March 31, 2026 and 2025, and the related consolidated statements of operations and comprehensive loss, stockholders’ equity, and cash flows for the for each of the years in the two-year period ended March 31, 2026, and the related notes (collectively referred to as “the financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of March 31, 2026 and 2025, and the results of its operations and its cash flows for each of the years in the two-year period ended March 31, 2026, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Location Sacramento, CA, USA    
Auditor Name Kreston GTA PC