Segment Information (Reconciliation Of Assets From Segment To Consolidated) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 190,816	$ 208,744
Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	(12,918)	(26,091)
Radiation Measurement [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	160,560	142,850
Medical Physics [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 43,174	43,677
Medical Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 48,308