Property, Equipment and Improvements, Net (Detail) - Property, equipment and improvements, net - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,684	$ 8,398
Less accumulated depreciation and amortization	(7,120)	(6,926)
Property, equipment and improvements, net	1,564	1,472
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	440	399
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,170	7,933
Automobiles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 74	$ 66