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Stock-Based Compensation - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
May 31, 2021 | May 31, 2020 | May 31, 2019 | Apr. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Allocated share-based compensation expenses | $ 17,351,000 | $ 18,079,000 | $ 21,951,000 |
Stock Appreciation Rights (SARs) |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share-based compensation, number of other than options issued | 0 |  |  |
Tilray 2018 Equity Incentive Plan and Original Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock granted value share based compensation | $ 500,000,000 |  |  |
Stock granted fair value share based compensation | $ 1,000,000 |  |  |
Stock options granted | 0 |  |  |
Risk-free interest rate |  | 2.10% | 2.92% |
Expected stock option life |  | 8 years 11 months 19 days | 5 years 9 months 14 days |
Expected volatility |  | 61.33% | 58.54% |
Tilray 2018 Equity Incentive Plan and Original Plan | Common Stock |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares reserved for future issuance |  |  |  | 9,806,851
Common shares reserved for issuance, annual automatic increase percentage | 4.00% |  |  |
Tilray 2018 Equity Incentive Plan and Original Plan | Stock Appreciation Rights (SARs) |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share-based compensation, number of other than options issued | 0 |  |  |
Predecessor Plan | Aphria |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Risk-free interest rate | 0.39% |  |  |
Expected stock option life | 5 years | 5 years |  |
Expected volatility | 70.00% | 70.00% | 70.00% |
Forfeiture rate | 35.00% | 20.00% | 0.00% |
Predecessor Plan | Time-based Stock Options | Aphria |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock options granted | 41,500 |  |  |
Weighted-average exercise price, Granted | $ 5.88 |  |  |
Weighted average remaining contractual term (years), exercisable | 2 years 2 months 12 days |  |  |
Weighted average fair values of stock options granted, per share | $ 2.18 | $ 3.54 | $ 7.32 |
Intrinsic values of stock options exercised | $ 4,679,758,000 | $ 4,869,447,000 | $ 28,025,979,000 |
Fair values of stock option vested | 3,054,257,000 | 9,592,767,000 | 14,983,131,000 |
Unrecognized compensation expenses | $ 3,058,733,000 | $ 8,209,817,000 | $ 17,110,533,000 |
Unrecognized stock-based compensation expense to be recognized in period, years | 1 year 21 days | 1 year 6 months 10 days | 1 year 6 months 7 days |
Predecessor Plan | Time-based Stock Options | Aphria | Officers |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock options granted | 41,500 |  |  |
Weighted-average exercise price, Granted | $ 5.88 |  |  |
Weighted average remaining contractual term (years), exercisable | 5 years |  |  |
Predecessor Plan | Performance Based Stock Option | Aphria |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Intrinsic values of stock options exercised | $ 746,743,000 | $ 326,033,000 | $ 1,864,100,000 |
Fair values of stock option vested | 395,138,000 | 222,721,000 | 461,188,000 |
Unrecognized compensation expenses |  | $ 1,074,701,000 | $ 1,206,415,000 |
Unrecognized stock-based compensation expense to be recognized in period, years |  | 6 months 29 days | 9 months 3 days |
Predecessor Plan | Time-based and Performance-based RSU | Aphria |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Intrinsic values of stock options exercised | 10,905,991,000 | $ 5,123,883,000 | $ 775,962,000 |
Fair values of stock option vested | 8,777,963,000 | 4,507,883,000 | 2,044,952,000 |
Unrecognized compensation expenses | $ 16,273,457,000 | $ 10,240,001,000 | $ 1,392,478,000 |
Unrecognized stock-based compensation expense to be recognized in period, years | 1 year 10 days | 1 year 5 months 8 days | 6 months 14 days |
Maximum | Tilray 2018 Equity Incentive Plan and Original Plan | Common Stock |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of common stock reserved for issuance, term | 10 years |  |  |
Maximum | Tilray 2018 Equity Incentive Plan and Original Plan | Stock Appreciation Rights (SARs) |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share-based compensation, grant term | 10 years |  |  |
Maximum | Tilray 2018 Equity Incentive Plan and Original Plan | Restricted Stock Units (RSUs) |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period | 4 years |  |  |
Maximum | Predecessor Plan | Aphria |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Risk-free interest rate |  | 1.56% | 2.38% |
Expected stock option life |  |  | 5 years |
Minimum | Tilray 2018 Equity Incentive Plan and Original Plan | Restricted Stock Units (RSUs) |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Minimum | Predecessor Plan | Aphria |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Risk-free interest rate |  | 1.20% | 1.66% |
Expected stock option life |  |  | 3 years |

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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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