General form of registration statement for all companies including face-amount certificate companies

Stock based Compensation - Stock options outstanding and vested (Details)

v3.20.1
Stock based Compensation - Stock options outstanding and vested (Details) - $ / shares
6 Months Ended 12 Months Ended
Feb. 29, 2020
Aug. 31, 2019
Weighted Average Remaining Contractual Life In Years   0 years
Exercise Prices One [Member] | Minimum [Member]    
Exercise Prices $ 18.80 $ 18.80
Exercise Prices One [Member] | Maximum [Member]    
Exercise Prices 40.00 40.00
Exercise Prices Two [Member] | Minimum [Member]    
Exercise Prices 40.01 40.01
Exercise Prices Two [Member] | Maximum [Member]    
Exercise Prices 80.00 80.00
Exercise Prices Three [Member] | Minimum [Member]    
Exercise Prices 80.01 80.01
Exercise Prices Three [Member] | Maximum [Member]    
Exercise Prices 120.00 120.00
Exercise Prices Four [Member] | Minimum [Member]    
Exercise Prices 120.01 120.01
Exercise Prices Four [Member] | Maximum [Member]    
Exercise Prices 160.00 160.00
Exercise Prices Five [Member] | Minimum [Member]    
Exercise Prices 160.01 160.01
Exercise Prices Five [Member] | Maximum [Member]    
Exercise Prices $ 391.60 $ 391.60
Options Vested One [Member]    
Number of options 250
Weighted Average Remaining Contractual Life In Years 9 years 5 months 1 day  
Weighted Average Exercise Price $ 20.00
Options Vested Two [Member]    
Number of options 4,896
Weighted Average Remaining Contractual Life In Years 9 years 1 month 2 days  
Weighted Average Exercise Price $ 51.23
Options Vested Three [Member]    
Number of options 6,394 4,202
Weighted Average Remaining Contractual Life In Years 8 years 2 months 19 days  
Weighted Average Exercise Price $ 102.46 $ 105.20
Weighted Average Remaining Contractual Life In Years   8 years 7 months 17 days
Options Vested Four [Member]    
Number of options 9,521 5,373
Weighted Average Remaining Contractual Life In Years 7 years 5 months 27 days  
Weighted Average Exercise Price $ 155.12 $ 158.40
Weighted Average Remaining Contractual Life In Years   7 years 7 months 6 days
Options Vested Five [Member]    
Number of options 1,124 716
Weighted Average Remaining Contractual Life In Years 7 years 4 months 17 days  
Weighted Average Exercise Price $ 391.60 $ 391.60
Weighted Average Remaining Contractual Life In Years   7 years 10 months 17 days
Options Vested [Member]    
Number of options 22,185 10,291
Weighted Average Remaining Contractual Life In Years 8 years 18 days  
Weighted Average Exercise Price $ 127.49 $ 152.80
Weighted Average Remaining Contractual Life In Years   8 years 15 days
Options Outstanding and Exercisable One [Member]    
Number of options 5,375 8,125
Weighted Average Remaining Contractual Life In Years 9 years 3 months 7 days 9 years 9 months 7 days
Weighted Average Exercise Price $ 24.35 $ 22.40
Options Outstanding and Exercisable Two [Member]    
Number of options 13,729 15,761
Weighted Average Remaining Contractual Life In Years 9 years 1 month 2 days 9 years 7 months 2 days
Weighted Average Exercise Price $ 51.21 $ 51.60
Options Outstanding and Exercisable Three [Member]    
Number of options 10,553 12,864
Weighted Average Remaining Contractual Life In Years 8 years 2 months 19 days 8 years 8 months 1 day
Weighted Average Exercise Price $ 102.93 $ 104.00
Options Outstanding and Exercisable Four [Member]    
Number of options 12,625 12,625
Weighted Average Remaining Contractual Life In Years 7 years 6 months 18 days 8 years 15 days
Weighted Average Exercise Price $ 155.28 $ 155.20
Options Outstanding and Exercisable Five [Member]    
Number of options 1,124 1,375
Weighted Average Remaining Contractual Life In Years 7 years 4 months 17 days 7 years 10 months 17 days
Weighted Average Exercise Price $ 391.60 $ 391.60
Options Outstanding and Exercisable [Member]    
Number of options 43,406 50,750
Weighted Average Remaining Contractual Life In Years 8 years 4 months 28 days 8 years 11 months 12 days
Weighted Average Exercise Price $ 99.55 $ 95.20