Balance Sheet Details (Tables)

6 Months Ended

Mar. 31, 2018

Balance Sheet Details

Schedule of components of accounts receivable

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

	March 31,		September 30,
	2018		2017
Accounts receivable
Billed	$	140,251		184,983
Unbilled		170,485		186,950
Allowance for doubtful accounts		(863)		(436)
Total accounts receivable		309,873		371,497
Less estimated amounts not currently due		(16,568)		(17,457)
Current accounts receivable	$	293,305	$	354,040

Components of inventories

Inventories consist of the following (in thousands):

	March 31,		September 30,
	2018		2017
Finished products	$	3,032	$	4,369
Work in process and inventoried costs under long-term contracts		98,733		84,131
Materials and purchased parts		15,101		10,163
Customer advances		(11,119)		(10,948)
Net inventories	$	105,747	$	87,715