Property, Plant, and Equipment, net (Tables)

9 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

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

	As of
(in thousands)	June 30, 2019			September 30, 2018
SDI land and building	$	12,890		$	—
Building and improvements	257			—
Equipment	41,170			36,625
Furniture and fixtures	1,109			1,109
Computer hardware and software	3,526			2,928
Leasehold improvements	2,560			2,049
Construction in progress	8,742			3,648
Property, plant, and equipment, gross	$	70,254		$	46,359
Accumulated depreciation	(33,023		)	(28,143		)
Property, plant, and equipment, net	$	37,231		$	18,216