Oil and Gas Reserve Data (Unaudited) - Schedule of Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Extractive Industries [Abstract]
Future cash inflows	$ 77,221,000	$ 110,778,000
Future production costs and taxes	(20,080,000)	(27,267,000)
Future development costs	(12,009,000)	(28,809,000)
Future income taxes	(6,413,000)	(13,386,000)
Future net cash flows	38,719,000	41,316,000
Annual 10% discount for estimated timing of cash flows	(19,843,000)	(22,233,000)
Standardized measure of discounted future net cash flows	$ 18,876,000	$ 19,083,000	$ 13,898,000