Earnings (Loss) Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ (1,834,122)	$ (3,555,215)	$ (20,454,814)	$ 1,892,114	$ (56,153,780)	$ 4,604,236	$ (1,931,334)	$ 12,735,940	$ (23,952,037)	$ (40,744,938)	$ 14,635,669
Denominator for basic and diluted earnings per share - Weighted average shares (including for 2020, 2019 and 2018, unissued, vested directors' shares of 154,142, 168.586 and 205.736, respectively)									17,010,934	16,743,746	16,952,664