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v3.20.1

Warrants (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 Warrant $ / shares shares | Dec. 31, 2018 Warrant $ / shares shares | Dec. 31, 2017 Warrant $ / shares
Statements Line Items |  |  |
Weighted average exercise price of warrants issued during period | $ 19.08 | $ 0 |
Number of warrants expired during period | shares | 5,715,500 | 0 |
Warrants outstanding, weighted average exercise price | $ 36.50 | $ 27.61 | $ 27.61
Warrants outstanding | Warrant | 5,480,000 | 11,195,500 | 11,195,500

X
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X
- Definition Number of warrants expired during period, weighted average exercise price. + References No definition available. + Details
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Namespace Prefix: | or_
Data Type: | num:perShareItemType
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Period Type: | duration

X
- Definition Warrants outstanding + References No definition available. + Details
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Namespace Prefix: | or_
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Balance Type: | na
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X
- Definition Statement [Line Items] + References No definition available. + Details
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Namespace Prefix: | or_
Data Type: | xbrli:stringItemType
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Period Type: | duration

X
- Definition Warrants outstanding, weighted average exercise price, beginning of period + References No definition available. + Details
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Namespace Prefix: | or_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant