Commitments and Contingencies (Narrative) (Details)			1 Months Ended				3 Months Ended					12 Months Ended
	Oct. 01, 2014	Sep. 23, 2014 USD ($)	Jun. 30, 2016 USD ($)	May 31, 2016	Dec. 31, 2015 USD ($)	Mar. 31, 2012 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2016 USD ($) building	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Nov. 30, 2014 building
Loss Contingencies [Line Items]
Minimum lease payments, 2017												$ 800,000
Minimum lease payments, 2018												300,000
Minimum lease payments, 2019												300,000
Minimum lease payments, 2020												200,000
Minimum lease payments, 2021												100,000
Operating leases, rent expense												$ 1,400,000	$ 1,300,000	$ 1,700,000
Fair value assumptions, credit adjusted risk-free rate, range minimal amount												1.20%
Fair value assumptions, credit adjusted risk-free rate, range maximum amount												4.20%
Accretion expense												$ 66,000	100,000	200,000
Gain from change in estimate on ARO obligation													2,900,000
Decrease in property, plant, and equipment													2,100,000
Asset retirement obligation, revision in estimated cash flows								$ 0	$ 0	$ 0	$ 845,000	0	845,000	0
Asset retirement obligation								$ 1,774,000				1,618,000	1,774,000
Payments to terminate lease agreement												200,000
Reduction in ARO												300,000
Business combination, indemnification assets, range of outcomes, value						$ 3,400,000.0
Business combination, indemnification duration, period taken into account for						2 years
Gain on settlement												0	$ 442,000	$ 0
Sumitomo Electric Industries, LTD [Member]
Loss Contingencies [Line Items]
Loss contingency, damages sought		$ 47,500,000
Recovery of fees and costs from SEI							$ 2,600,000
Gain on settlement												$ 3,400,000
Buildings [Member] | Property Subject to Operating Lease [Member]
Loss Contingencies [Line Items]
Number of leased buildings | building												6
Leases retroactively effective | building															4
Lease term	3 years
Operating lease, term extension, option to extend	3 years
Minimum [Member] | Mirasol Class Action [Member]
Loss Contingencies [Line Items]
Estimate of loss												$ 39,000
Maximum [Member] | Mirasol Class Action [Member]
Loss Contingencies [Line Items]
Estimate of loss												2,600,000
Property in Beijing, China [Member]
Loss Contingencies [Line Items]
Lease term				5 years
Asset retirement obligation												48,000
Discontinued Operations, Disposed of by Sale [Member]
Loss Contingencies [Line Items]
Payments to terminate lease agreement					$ 200,000
Discontinued Operations, Disposed of by Sale [Member] | Sumitomo Electric Industries, LTD [Member]
Loss Contingencies [Line Items]
Gain on settlement												3,800,000
Write off of loss accrual												400,000
Settled Litigation [Member] | Sumitomo Electric Industries, LTD [Member]
Loss Contingencies [Line Items]
Loss contingency, proceeds			$ 1,900,000
Recovery of fees and costs from SEI												$ 2,600,000