Property, Plant, and Equipment, net

12 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment, net

Property, Plant, and Equipment, net

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

	As of September 30,
(in thousands)	2018			2017
Equipment	$	36,625		$	31,507
Furniture and fixtures	1,109			1,109
Computer hardware and software	2,928			2,974
Leasehold improvements	2,049			2,330
Construction in progress	3,648			4,539
Property, plant, and equipment, gross	$	46,359		42,459
Accumulated depreciation	(28,143		)	(25,824		)
Property, plant, and equipment, net	$	18,216		$	16,635

Depreciation expense totaled $5.6 million, $3.7 million and $2.4 million during the fiscal years ended September 30, 2018, 2017 and 2016, respectively.

Impairment testing

As of September 30, 2018 and 2016, we determined no impairment triggers were present, and therefore, an impairment test was not performed.

In March 2017, in connection with our opening a new manufacturing facility in China, we identified equipment with a net book value of approximately $0.6 million that would no longer be utilized after the completion of the move later in fiscal year 2017. After taking into consideration the costs of disposal and estimated net funds from the sale of the equipment of approximately $0.1 million, we recorded a charge to impairments of approximately $0.5 million in the fiscal year ended September 30, 2017.