Property, Plant, and Equipment, net (Tables)

12 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Plant and equipment are depreciated on a straight-line basis over the following estimated useful lives of the assets: 

Estimated Useful Life
Equipment	—	three to ten years
Furniture and fixtures	—	five years
Computer hardware and software	—	five to seven years
Leasehold improvements	—	three to six years

Leasehold improvements are amortized over the lesser of the asset life or the lease term. Expenditures for repairs and maintenance are charged to expense as incurred. The costs for major renewals and improvements are capitalized and depreciated over their estimated useful lives of the related asset. The cost and related accumulated depreciation of the assets are removed from the accounts upon disposition and any resulting gain or loss is reflected in the consolidated statement of operations and comprehensive income.

The components of property, plant, and equipment, net consisted of the following:

	As of			As of
(in thousands)	September 30, 2016			September 30, 2015
Equipment	$	28,247		$	24,913
Furniture and fixtures	1,109			1,109
Computer hardware and software	2,860			2,177
Leasehold improvements	1,896			1,480
Construction in progress	1,779			875
Property, plant, and equipment, gross	35,891			30,554
Accumulated depreciation	(23,678		)	(21,629		)
Property, plant, and equipment, net	$	12,213		$	8,925