Goodwill (Tables)

12 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

The changes to goodwill during the years ended September 30, 2017 and 2016 are summarized as follows:

	Contract
	Research		Optics		Total
Goodwill at September 30, 2015	$	4,939,000	$	1,192,000	$	6,131,000
Currency translation on Hilger Crystals		-		(233,000)		(233,000)
Goodwill at September 30, 2016	$	4,939,000	$	959,000	$	5,898,000
Currency translation on Hilger Crystals		-		42,000		42,000
Goodwill at September 30, 2017	$	4,939,000	$	1,001,000	$	5,940,000