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Warrants (Tables)
12 Months Ended
Feb. 28, 2019
Equity [Abstract]  
Warrant activity
      2019     2018
   Number of warrants  Weighted average exercise price  Number of warrants  Weighted average exercise price
 Outstanding, beginning of period    140,667   $12.00    637,670   $6.00 
 Issued    802,469    10.74    171,917    12.00 
 Exercised    —      —      (225,020)   6.83 
 Expired    (140,667)   12.00    (443,900)   6.00 
 Outstanding, end of period    802,469   $10.74    140,667   $12.00 
Warrants outstanding
      2019
   Number of warrants  Weighted average exercise price
 January 15, 2020    277,778   $9.32 
 January 21, 2020    24,691    9.32 
 February 25, 2021    200,000    11.00 
 February 25, 2021    300,000    12.00 
 Outstanding, end of period    802,469   $10.74