Quarterly report pursuant to Section 13 or 15(d)

Activity Related to Notes (Detail 1)

v3.19.3
Activity Related to Notes (Detail 1)
3 Months Ended
Aug. 31, 2019
USD ($)
Debt Instrument [Line Items]  
Monthly redemption provision $ 0
Note amendment, net 111,410
Redemptions (2,460,000)
Interest accretion 564,555
August 31, 2019 Note 3,915,965
Short-term Debt [Member]  
Debt Instrument [Line Items]  
Monthly redemption provision 2,100,000
Note amendment, net 0
Redemptions (676,582)
Interest accretion 161,933
August 31, 2019 Note 3,685,351
Long-term Debt [Member]  
Debt Instrument [Line Items]  
Monthly redemption provision (2,100,000)
Note amendment, net 111,410
Redemptions (1,783,418)
Interest accretion 402,622
August 31, 2019 Note 230,614
Two Thousand And Eighteen Convertible Notes [Member]  
Debt Instrument [Line Items]  
June 2018 Note 5,700,000
Two Thousand And Eighteen Convertible Notes [Member] | Short-term Debt [Member]  
Debt Instrument [Line Items]  
June 2018 Note 2,100,000
Two Thousand And Eighteen Convertible Notes [Member] | Long-term Debt [Member]  
Debt Instrument [Line Items]  
June 2018 Note $ 3,600,000