Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Sep. 30, 2018							1,805,053	(424,307)
Balance at Sep. 30, 2018				$ 115,786,000	$ (115,786,000)		$ 18,000	$ (4,000)	$ 1,755,000	$ 45,361,000	$ 115,786,000	$ 162,916,000
Net (loss) income										(21,533,000)		(21,533,000)
Balance (in shares) at Dec. 31, 2018							1,805,053	(424,307)
Balance at Dec. 31, 2018							$ 18,000	$ (4,000)	1,755,000	139,614,000		141,383,000
Balance (in shares) at Sep. 30, 2018							1,805,053	(424,307)
Balance at Sep. 30, 2018				$ 115,786,000	$ (115,786,000)		$ 18,000	$ (4,000)	1,755,000	45,361,000	115,786,000	162,916,000
Net (loss) income												(16,515,000)
Balance (in shares) at Mar. 31, 2019							1,805,053	(424,307)
Balance at Mar. 31, 2019							$ 18,000	$ (4,000)	1,755,000	144,632,000		146,401,000
Balance (in shares) at Dec. 31, 2018							1,805,053	(424,307)
Balance at Dec. 31, 2018							$ 18,000	$ (4,000)	1,755,000	139,614,000		141,383,000
Net (loss) income										5,018,000		5,018,000
Balance (in shares) at Mar. 31, 2019							1,805,053	(424,307)
Balance at Mar. 31, 2019							$ 18,000	$ (4,000)	1,755,000	144,632,000		146,401,000
Balance (in shares) at Sep. 30, 2019							1,805,053	(424,307)
Balance at Sep. 30, 2019							$ 18,000	$ (4,000)	1,755,000	135,931,000		137,700,000
Net (loss) income										14,210,000		14,210,000
Balance (in shares) at Dec. 31, 2019							1,805,053	(424,307)
Balance at Dec. 31, 2019							$ 18,000	$ (4,000)	1,755,000	150,141,000		151,910,000
Balance (in shares) at Sep. 30, 2019							1,805,053	(424,307)
Balance at Sep. 30, 2019							$ 18,000	$ (4,000)	1,755,000	135,931,000		137,700,000
Net (loss) income												(42,116,000)
Balance (in shares) at Mar. 31, 2020							1,805,053	(424,307)
Balance at Mar. 31, 2020							$ 18,000	$ (4,000)	1,755,000	93,815,000		95,584,000
Balance (in shares) at Dec. 31, 2019							1,805,053	(424,307)
Balance at Dec. 31, 2019							$ 18,000	$ (4,000)	1,755,000	150,141,000		151,910,000
Net (loss) income										(56,326,000)		(56,326,000)
Balance (in shares) at Mar. 31, 2020							1,805,053	(424,307)
Balance at Mar. 31, 2020							$ 18,000	$ (4,000)	$ 1,755,000	$ 93,815,000		$ 95,584,000