Quarterly report pursuant to Section 13 or 15(d)

Acquisition and Disposition - Schedule of Discontinued Operation (Details)

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Acquisition and Disposition - Schedule of Discontinued Operation (Details) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2018
Jan. 31, 2017
Business Combinations [Abstract]        
Revenues   $ 7,885,310  
Cost of sales   6,653,363  
Gross profit   1,231,947  
Operating and other non-operating expenses (including impairment charge of 6,094,760)   (7,406,271)  
Gain from extinguishment of liabilities 3,428   248,684
Loss from discontinued operations 3,428 (5,925,640)
Gain/Loss from sale of discontinued operations (7,538) 94,485
Total loss from discontinued operations $ (4,110) $ (5,831,155)