Equity In Joint Veture (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Revenues	$ 34,937	$ 26,663	$ 22,513
Gross profit	19,796	15,125	10,922
Net income	6,374	4,382	3,002
Current assets	27,738	13,885
Other assets	44,404	21,515
Current liabilities	19,580	11,552
Other liabilities	$ 3,727	$ 2,488
Nagase-Landauer Ltd [Member]
Equity percentage in joint venture	50.00%
Epsilon Landauer Dozimetri [Member]
Equity percentage in joint venture	50.00%
Yamasato, Fujiwara, Higa and Associates, Inc [Member]
Equity percentage in joint venture	49.00%