Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Details) - USD ($)	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Total revenue	$ 2,573,668	$ 2,887,830
North America [Member]
Total revenue	1,744,753	1,738,303
EMEA [Member]
Total revenue	469,520	641,994
Asia Pacific [Member]
Total revenue	252,712	416,025
Latin America [Member]
Total revenue	$ 106,683	$ 91,508