XML 54 R29.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Cash Equivalents and Short Term Investments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Cash Equivalents And Short Term Investments [Abstract] |
Schedule of short-term investments |
| Face Value $ |  | Original Cost $ |  | Accrued Interest $ |  | Carrying Value $ |  | Fair Value $ |  | Effective Interest Rate %
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Short-term investments | — |  | — |  | — |  | — |  | — |  | —%
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
Short-term investments | 2,088,800 |  | 2,088,800 |  | — |  | 2,088,800 |  | 2,088,800 |  | 1.41%

X
- Definition Cash Equivalents And Short Term Investments [Abstract] + References No definition available. + Details
Name: | oncyf_CashEquivalentsAndShortTermInvestmentsAbstract
Namespace Prefix: | oncyf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Short-Term Investments [Table Text Block] + References No definition available. + Details
Name: | oncyf_ScheduleOfShortTermInvestmentsTableTextBlock
Namespace Prefix: | oncyf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration