XML 61 R41.htm IDEA: XBRL DOCUMENT v3.19.1

Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2018 plan
Summary Of Significant Accounting Policie [Abstract]
Number of plans	1
Maximum option expiration term	10 years

X

- Definition

Maximum Term Of Options Granted For Share-based Payment Arrangement

+ References

No definition available.

+ Details

Name:	oncyf_MaximumTermOfOptionsGrantedForSharebasedPaymentArrangement
Namespace Prefix:	oncyf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Stock Option Plans

+ References

No definition available.

+ Details

Name:	oncyf_NumberOfStockOptionPlans
Namespace Prefix:	oncyf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Summary Of Significant Accounting Policie [Abstract]

+ References

No definition available.

+ Details

Name:	oncyf_SummaryOfSignificantAccountingPolicieAbstract
Namespace Prefix:	oncyf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration