Segment Information (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	[1]	Jun. 30, 2015 USD ($) segment	Jun. 30, 2014 USD ($)	[1]	Sep. 30, 2014 USD ($)
Segment Reporting Information [Line Items]
Reporting segments | segment				3
Consolidated revenues	$ 35,467	$ 35,868		$ 111,153	$ 113,069
Consolidated operating income	5,111	(59,627)		16,882	(47,339)
Consolidated Assets	208,074			208,074			$ 216,586
Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Assets	(25,370)			(25,370)			(18,580)
Radiation Measurement [Member]
Segment Reporting Information [Line Items]
Consolidated revenues	24,143	25,320		77,880	82,187
Consolidated operating income	7,604	7,466		26,402	26,095
Consolidated Assets	144,365			144,365			148,151
Medical Physics [Member]
Segment Reporting Information [Line Items]
Consolidated revenues	8,926	8,175		25,971	23,943
Consolidated operating income	1,143	435		2,082	1,467
Consolidated Assets	40,448			40,448			38,851
Medical Products [Member]
Segment Reporting Information [Line Items]
Consolidated revenues	2,398	2,373		7,302	6,939
Consolidated operating income	375	(62,429)		953	(62,891)
Consolidated Assets	48,631			48,631			$ 48,164
Corporate [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	$ (4,011)	$ (5,099)		$ (12,555)	$ (12,010)

[1] As Restated