Oil and Gas Reserve Data (Unaudited) - Schedule of Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Extractive Industries [Abstract]
Future cash inflows	$ 110,778,000	$ 57,318,000	$ 72,238,000
Future production costs and taxes	(27,267,000)	(14,571,000)	(19,569,000)
Future development costs	(28,809,000)	(9,617,000)	(6,617,000)
Future income taxes	(13,386,000)	(4,569,000)	(9,254,000)
Future net cash flows	41,316,000	28,561,000	36,798,000
Annual 10% discount for estimated timing of cash flows	(22,233,000)	(14,663,000)	(17,860,000)
Standardized measure of discounted future net cash flows	$ 19,083,000	$ 13,898,000	$ 18,938,000	$ 19,329,000