Product Warranties (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Product Warranties [Abstract]
Balance at beginning of period	$ 650,000	$ 833,000	$ 650,000	$ 833,000	$ 650,000	$ 650,000	$ 836,000	$ 849,000
Provision for warranties	106,000	117,000	324,000	366,000
Expenses incurred	$ (106,000)	$ (120,000)	$ (324,000)	$ (382,000)