Inventories - Net Inventories (Detail) - USD ($)	Jun. 30, 2015	Sep. 30, 2014
Inventory, Net [Abstract]
Raw materials	$ 6,374,000	$ 6,097,000
Work in process	1,682,000	2,414,000
Finished goods	4,828,000	4,988,000
Used equipment	268,000	174,000
Inventories, net	$ 13,152,000	$ 13,673,000