Condensed Consolidated Statement of Changes in Stockholders' Equity - 9 months ended Jan. 31, 2018 - USD ($)	Preferred Stock Series C [Member]	Preferred Stock Series E [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Apr. 30, 2017	$ 45		$ 6,932	$ 15,813,297	$ (4,570,057)	$ 11,250,217
Balance, shares at Apr. 30, 2017	45,002		6,932,059
Recapitalization of the Company			$ 1,205	5,660,730		5,661,935
Recapitalization of the Company, shares			1,204,667
Issuance of common stock for cash			$ 1,568	2,588,436		2,590,004
Issuance of common stock for cash, shares			1,568,100
Issuance of preferred stock and warrants for cash		$ 3		4,918,617		4,918,620
Issuance of preferred stock and warrants for cash, shares		2,500
Issuance of common stock for the acquisition of mineral rights			$ 15	35,835		35,850
Issuance of common stock for the acquisition of mineral rights, shares			15,000
Issuance of common stock for services			$ 300	664,910		665,210
Issuance of common stock for services, shares			299,435
Issuance of common stock for prepaid services			$ 106	253,831		253,937
Issuance of common stock for prepaid services, shares			106,250
Conversion of preferred stock into common stock	$ (43)	$ (2)	$ 6,032	(5,987)
Conversion of preferred stock into common stock, shares	(42,623)	(1,770)	6,032,320
Issuance of common stock for accrued services			$ 52	137,448		137,500
Issuance of common stock for accrued services, shares			52,585
Net loss					(12,477,984)	(12,477,984)
Balance at Jan. 31, 2018	$ 2	$ 1	$ 16,210	$ 30,067,117	$ (17,048,041)	$ 13,035,289
Balance, shares at Jan. 31, 2018	2,379	730	16,210,416