Restatement of previously issued financial statements (Detail) - USD ($)	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Mar. 31, 2018
Total Assets	$ 11,795,451		$ 9,695,218
Accounts payable	1,455,898		1,474,221
Accrued expenses	107,621		348,460
Current income taxes payable	3,000		3,000
Total current liabilities	98,343,463		79,665,574
Asset retirement obligations	20,017		41,523			$ 303,809	$ 979,159
Total Liabilities	98,363,480		79,707,097
Common Stock	25,000		5,000
Additional paid in capital	201,326,296		179,783,233
Retained (deficit)	(293,222,463)		(259,601,558)
Total stockholders' equity (deficit)	(91,871,167)	$ (85,169,087)	(79,813,325)	$ (61,401,990)	$ (58,349,633)	(56,839,098)
TOTAL LIABILITIES AND EQUITY	11,795,451		9,695,218
Derivative liability non current	96,751,178		77,636,666			$ 5	$ 5
Previously Reported [Member]
Total Assets	11,795,451		9,695,218
Accounts payable	1,455,898		1,474,221
Common stock payable			173,000
Accrued expenses	10,762		348,460
Derivative liability	30,866,933		8,669,831
Current ARO	25,766		30,227
Current income taxes payable	3,000		3,000
Total current liabilities	32,459,218		10,698,739
Asset retirement obligations	20,017		41,523
Total Liabilities	32,479,235		10,740,262
Commitments and contingencies			0
Preferred Stock Series C	38,002,002		39,389,202
Preferred Stock Series B	0
Common Stock	25,000		5,000
Additional paid in capital	161,157,247		149,825,528
Retained (deficit)	(219,868,033)		(190,264,774)
Total stockholders' equity (deficit)	(58,685,786)		(40,434,246)
TOTAL LIABILITIES AND EQUITY	11,795,451		9,695,218
Adjustment [Member]
Total Assets	0		0
Accounts payable			0
Common stock payable			0
Accrued expenses			0
Derivative liability	65,884,245		68,966,835
Current ARO			0
Current income taxes payable			0
Total current liabilities	65,884,245		68,966,835
Asset retirement obligations	0		0
Total Liabilities	65,884,245		68,966,835
Commitments and contingencies			0
Preferred Stock Series C	(32,698,864)		(29,587,756)
Common Stock	0		0
Additional paid in capital	40,169,049		29,957,705
Retained (deficit)	(73,354,430)		(69,336,784)
Total stockholders' equity (deficit)	(33,185,381)		39,379,079
TOTAL LIABILITIES AND EQUITY	0		0
Derivative liability non current	0
Restated [Member]
Total Assets	11,795,451		9,695,218
Accounts payable	1,455,898		1,474,221
Common stock payable			173,000
Accrued expenses	107,621		348,460
Derivative liability	96,751,178		77,636,666
Current ARO	25,766		302,227
Current income taxes payable	3,000		3,000
Total current liabilities	98,343,463		79,665,574
Asset retirement obligations	20,017		41,523
Total Liabilities	98,363,480		79,707,097
Commitments and contingencies			0
Preferred Stock Series C	5,303,138		9,801,446
Preferred Stock Series B	0
Common Stock	25,000		5,000
Additional paid in capital	201,326,296		179,783,233
Retained (deficit)	(293,222,463)		(259,601,558)
Total stockholders' equity (deficit)	(91,871,167)		79,813,325
TOTAL LIABILITIES AND EQUITY	$ 11,795,451		$ 9,695,218