Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.10.0.1
Subsequent Events (Details) - USD ($)
12 Months Ended
Sep. 03, 2018
Apr. 30, 2018
Apr. 30, 2017
Subsequent Event [Line Items]      
Payment of letter of credit   $ 2,150,000
Subsequent Event [Member] | USU [Member]      
Subsequent Event [Line Items]      
Payment of letter of credit $ 255,708