Oil and Gas Reserve Data (Unaudited) - Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows to Proved Oil and Gas Reserves (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Extractive Industries [Abstract]
Sales of oil and gas produced, net of production costs	$ (1,806,000)	$ (1,711,000)
Net changes in price and production costs	(2,871,000)	36,000
Changes in previously estimated development costs	865,000	1,923,000
Revisions of quantity estimates	(2,140,000)	(6,901,000)
Net change due to purchases and sales of minerals in place	(335,000)
Extensions and discoveries, less related costs	1,519,000	4,333,000
Net change in income taxes	404,000	61,000
Accretion of discount	2,164,000	2,200,000
Changes in timing of estimated cash flows and other	1,924,000	435,000
Changes in standardized measure	(276,000)	376,000
Standardized measure, beginning of year	19,252,000	18,876,000
Standardized measure, end of year	$ 18,976,000	$ 19,252,000