Segment Information (Reconciliation Of Assets From Segment To Consolidated) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 276,833	[1]	$ 302,125	[1]
Radiation Measurement [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	170,648		171,831
Medical Physics [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	35,218		36,304
Medical Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 70,967		$ 93,990

[1] Restated