SUPPLEMENTAL DISCLOSURES ON STATEMENTS OF CASH FLOWS (Disclosure of cash and cash equivalents) (Parentheticals) (Details)	12 Months Ended
Mar. 31, 2022
Supplemental Cash Flow Information [Abstract]
Rate of cashable guaranteed investment certificate	0.50%

Represents the rate on cashable guaranteed investment certificate.

No definition available.

Name:	ztek_RateOfCashableGuaranteedInvestmentCertificate
Namespace Prefix:	ztek_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration