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Selected Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Information (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenues	$ 3,352,847	$ 7,712,619	$ 9,381,615	$ 9,152,215	$ 10,373,396	$ 9,501,028	$ 11,048,118	$ 12,307,079
Income (loss) from operations	(2,786,164)	951,814	2,249,764	3,274,019	3,955,194	2,952,955	4,733,747	5,994,927	$ 3,689,433	$ 17,636,823
Net income (loss) attributable to common shareholders	$ (2,330,825)	$ 3,710,159	$ 1,764,918	$ 2,792,820	$ 3,277,825	$ 2,398,875	$ 3,904,565	$ 5,795,801	$ 5,937,072	$ 15,377,066
Basic earnings (loss) per common share (in dollars per share)	$ (0.07)	$ 0.11	$ 0.05	$ 0.08	$ 0.10	$ 0.07	$ 0.12	$ 0.18	$ 0.18	$ 0.46
Diluted earnings (loss) per common share (in dollars per share)	$ (0.07)	$ 0.11	$ 0.05	$ 0.08	$ 0.10	$ 0.07	$ 0.12	$ 0.17	$ 0.18	$ 0.46
Net tax benefit		$ 2,800,000							$ 2,800,000
Affiliate Of Enduro Resource Partners LLC
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Other income				$ 1,100,000

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