Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Consolidated Balance Sheets [Abstract]
Receivables, allowances	$ 630	$ 600
Intangible assets, accumulated amortization	15,826	13,604
Dosimetry devices, accumulated depreciation	$ 10,406	$ 9,472
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	9,626,074	9,575,926
Common stock, shares outstanding	9,626,074	9,575,926