Equity In Joint Vetures (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
Revenues	$ 41,537	$ 46,591	$ 48,897
Gross profit	16,836	17,141	18,244
Net income	4,585	4,782	$ 4,740
Current assets	21,159	23,053
Other assets	46,872	41,885
Current liabilities	12,689	15,077
Other liabilities	$ 4,672	$ 5,009
Nagase-Landauer, Ltd [Member]
Schedule of Equity Method Investments [Line Items]
Equity percentage in joint venture	50.00%
Epsilon Landauer Dozimetri [Member]
Schedule of Equity Method Investments [Line Items]
Equity percentage in joint venture	50.00%
Yamasato, Fujiwara, Higa and Associates, Inc [Member]
Schedule of Equity Method Investments [Line Items]
Equity percentage in joint venture	49.00%