Quarterly report pursuant to Section 13 or 15(d)

Activity Related to Notes (Detail 1)

v3.19.1
Activity Related to Notes (Detail 1) - USD ($)
 9 Months Ended 12 Months Ended
Feb. 28, 2019
May 31, 2018
Debt Instrument [Line Items]    
June 2018 Note $ 0  
Monthly redemption provision 0 $ 0
Note amendment, net 111,410  
Redemptions (455,000) 0
January 2019 Note 5,425,416 0
Short-term Debt [Member]    
Debt Instrument [Line Items]    
Monthly redemption provision 2,100,000  
Note amendment, net 0  
Redemptions 0  
January 2019 Note 4,200,000  
Long-term Debt [Member]    
Debt Instrument [Line Items]    
Monthly redemption provision (2,100,000)  
Note amendment, net 111,410  
Redemptions (455,000)  
January 2019 Note 1,225,416  
Two Thousand And Eighteen Convertible Notes Member [Member]    
Debt Instrument [Line Items]    
June 2018 Note 5,700,000 0
January 2019 Note   5,700,000
Two Thousand And Eighteen Convertible Notes Member [Member] | Short-term Debt [Member]    
Debt Instrument [Line Items]    
June 2018 Note 2,100,000  
January 2019 Note   2,100,000
Two Thousand And Eighteen Convertible Notes Member [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
June 2018 Note 3,600,000  
January 2019 Note   3,600,000
Two Thousand And Nineteen Convertible Notes Member [Member]    
Debt Instrument [Line Items]    
June 2018 Note 0  
January 2019 Note 69,006 $ 0
Two Thousand And Nineteen Convertible Notes Member [Member] | Short-term Debt [Member]    
Debt Instrument [Line Items]    
January 2019 Note 0  
Two Thousand And Nineteen Convertible Notes Member [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
January 2019 Note $ 69,006