Capital Lease Obligation (Details) - USD ($) $ in Thousands	Jan. 01, 2015	Jun. 30, 2016	Sep. 30, 2015
Leases, Capital [Abstract]
Lease Term	20 years
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016 (remainder of fiscal year)		$ 89
2017		534
2018		538
2019		545
2020		550
Thereafter		8,100
Total minimum capital lease payments		10,356
Less amounts representing interest		(6,012)
Present value of net minimum capital lease payments		4,344	$ 4,380
Less current obligation		(431)
Total long term capital lease obligation		3,913
Long-term obligations (less current portion)
Future capital lease rental payments		4,344	4,380
Environmental post-closure monitoring and maintenance activities		749	749
Less amounts due within one year		(518)	(555)
Long-term obligations (less current portion)		$ 4,575	$ 4,574