Balance Sheet Details (Tables)

9 Months Ended

Jun. 30, 2019

Balance Sheet Details

Schedule of components of accounts receivable

The components of accounts receivable are as follows (in thousands):

	June 30,		September 30,
	2019		2018
Accounts receivable
Billed	$	180,594	$	156,948
Unbilled		—		242,877
Allowance for doubtful accounts		(1,745)		(1,324)
Total accounts receivable		178,849		398,501
Less estimated amounts not currently due		—		(6,134)
Current accounts receivable	$	178,849	$	392,367

Components of property, plant and equipment

	June 30,		September 30,
	2019		2018
Land and land improvements	$	9,611	$	13,132
Buildings and improvements		32,343		57,959
Machinery and other equipment		94,447		81,727
Software		94,821		84,631
Leasehold improvements		17,351		11,991
Construction and internal-use software development in progress		18,069		12,888
Accumulated depreciation and amortization		(129,638)		(144,782)
	$	137,004	$	117,546

Components of inventories

Inventories consist of the following (in thousands):

	June 30,		September 30,
	2019		2018
Finished products	$	12,745	$	7,099
Work in process and inventoried costs under long-term contracts		73,838		63,169
Materials and purchased parts		37,714		23,710
Customer advances		—		(9,779)
Net inventories	$	124,297	$	84,199