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Common Shares and Warrants (Details 2) - $ / shares | 12 Months Ended
--- | ---
Aug. 31, 2018 | Aug. 31, 2017
Common Shares And Warrants [Roll Forward] |  |  |
Number of Warrants, Beginning of Period | 8,844,506 |  | 12,136,241
Weighted Average Exercise Price, Beginning of Period | $ 0.29 |  | $ 0.18
Number of Warrants, Cancelled/Expired | 230,000 |  | 1,004,150
Weighted Average Exercise Price, Cancelled/Expired | $ 0.17 |  | $ 0.22
Number of Warrants, Exercised | 6,364,145 | [1] | 10,322,025
Weighted Average Exercise Price, Exercised | $ 0.28 |  | $ 0.23
Number of Warrants, Issued | 1,035,913 |  | 8,034,440
Weighted Average Exercise Price, Issued | $ 1.48 |  | $ 0.36
Number of Warrants, End of Period | 3,286,274 |  | 8,844,506
Weighted Average Exercise Price, End of Period | $ 0.72 |  | $ 0.29
[1] | Includes 111,291 broker warrants exercised for gross proceeds of $39,522

X
- Definition Class of Warrant or Right, Exercises in Period + References No definition available. + Details
Name: | lxrp_ClassOfWarrantOrRightExercised
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or Right, Exercises in Period, Weighted Average Exercise Price + References No definition available. + Details
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Namespace Prefix: | lxrp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or Right, Expirations in Period + References No definition available. + Details
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Namespace Prefix: | lxrp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or Right, Expirations in Period, Weighted Average Exercise Price + References No definition available. + Details
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Namespace Prefix: | lxrp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or Right, Grants in Period, Net of Forfeitures + References No definition available. + Details
Name: | lxrp_ClassOfWarrantOrRightGrantsInPeriod
Namespace Prefix: | lxrp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or Right, Grants in Period, Weighted Average Exercise Price + References No definition available. + Details
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Namespace Prefix: | lxrp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or Right, Outstanding, Weighted Average Exercise Price, Beginning of Period + References No definition available. + Details
Name: | lxrp_ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice
Namespace Prefix: | lxrp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | lxrp_CommonSharesAndWarrantsRollForward
Namespace Prefix: | lxrp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant