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, 2019	Mar. 31, 2018
Extractive Industries [Abstract]
Sales of oil and gas produced, net of production costs	$ (1,711,000)	$ (1,580,000)
Net changes in price and production costs	36,000	6,967,000
Changes in previously estimated development costs	1,923,000	16,196,000
Revisions of quantity estimates	(6,901,000)	(23,969,000)
Net change due to purchases and sales of minerals in place		(1,744,000)
Extensions and discoveries, less related costs	4,333,000	1,240,000
Net change in income taxes	61,000	3,057,000
Accretion of discount	2,200,000	2,527,000
Changes in timing of estimated cash flows and other	435,000	(2,901,000)
Changes in standardized measure	376,000	(207,000)
Standardized measure, beginning of year	18,876,000	19,083,000
Standardized measure, end of year	$ 19,252,000	$ 18,876,000