Commitments and Contingencies (Narrative) (Details)			1 Months Ended		3 Months Ended				9 Months Ended
	Oct. 01, 2014	Sep. 23, 2014 USD ($)	May 31, 2016	Mar. 31, 2012 USD ($)	Jun. 30, 2016 USD ($) building	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2016 USD ($) building	Jun. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Nov. 30, 2014 building
Loss Contingencies [Line Items]
Operating leases, rent expense					$ 500,000		$ 300,000		$ 1,100,000	$ 1,000,000
Fair value assumptions, credit adjusted risk-free rate, range minimal amount					1.20%				1.20%
Fair value assumptions, credit adjusted risk-free rate, range maximum amount					4.20%				4.20%
Accretion expense					$ 15,000		22,000		$ 45,000	89,000
Asset retirement obligation					1,589,000				1,589,000		$ 1,774,000
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	$ 800,000	0	845,000
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
Sumitomo Electric Industries, LTD [Member]
Loss Contingencies [Line Items]
Loss contingency, damages sought		$ 47,500,000
Receivable in escrow					1,900,000				1,900,000
Recovery of fees and costs from SEI					$ 2,600,000				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				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					$ 0				$ 0
Maximum [Member] | Mirasol Class Action [Member]
Loss Contingencies [Line Items]
Estimate of loss					2,600,000				2,600,000
Property in Beijing, China [Member]
Loss Contingencies [Line Items]
Lease term			5 years
Asset retirement obligation					$ 34,000				$ 34,000