Leases - Balance sheet (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2023	Dec. 31, 2022
Leases
Aggregate lease commitments	$ 3,252	$ 2,759
Less: impact of present value	(372)	(262)
Balance, cost	2,880	2,497
Straight line amortization	1,349	946
Interest	(150)	(114)
Balance, reduction in right-of-use asset	1,199	832
Net book value	1,681	1,665
Additions	2,921	2,520
Payments	(1,319)	(896)
Interest	150	114
Current portion of lease liabilities	679	641
Long term portion of lease liabilities	1,073	1,097
Total lease liabilities	$ 1,752	$ 1,738

No definition available.

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

+ Details

Name:	us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

+ Details

Name:	us-gaap_OperatingLeaseLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980

+ Details

Name:	us-gaap_OperatingLeasePayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of additions to the operating lease liability during the period.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseLiabilityAdditions
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the effect during the period of interest on the operating lease liability.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseLiabilityInterest
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of accumulated amortization associated with the right of use asset under operating lease as of the specified date.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseRightOfUseAssetAccumulatedAmortization
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of aggregate lease commitments under operating lease as of the specified date.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseRightOfUseAssetAggregateLeaseCommitments
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization expense attributable to right-of-use asset from operating lease.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseRightOfUseAssetAmortization
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the cost of right of use asset under operating lease as of the specified date.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseRightOfUseAssetCost
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the impact of present value on the right of use asset under operating lease.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseRightOfUseAssetImpactOfPresentValue
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of interest expense for operating lease right-of-use asset.

+ References

No definition available.

+ Details

Name:	zom_OperatingLeaseRightofuseAssetInterest
Namespace Prefix:	zom_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant