Fair Value Measurements of Financial Instruments - Summary of Financial Assets and Liabilities (Details) - USD ($)	Oct. 31, 2018	Apr. 30, 2018
Total assets	$ 4,527,188	$ 2,757,188
Total liabilities		30,172,153
Derivative Liabilities [Member]
Total liabilities		30,172,153
Level 1 [Member]
Total assets
Total liabilities
Level 1 [Member] | Derivative Liabilities [Member]
Total liabilities
Level 2 [Member]
Total assets
Total liabilities		35,000
Level 2 [Member] | Derivative Liabilities [Member]
Total liabilities		35,000
Level 3 [Member]
Total assets	4,527,188	2,757,188
Total liabilities		30,137,153
Level 3 [Member] | Derivative Liabilities [Member]
Total liabilities		30,137,153
Investment in Unconsolidated Entities [Member]
Total assets	4,527,188	2,757,188
Investment in Unconsolidated Entities [Member] | Level 1 [Member]
Total assets
Investment in Unconsolidated Entities [Member] | Level 2 [Member]
Total assets
Investment in Unconsolidated Entities [Member] | Level 3 [Member]
Total assets	$ 4,527,188	$ 2,757,188