Balance Sheet Details (Tables)

6 Months Ended

Mar. 31, 2017

Balance Sheet Details

Schedule of components of accounts receivable

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

	March 31,		September 30,
	2017		2016
Trade and other receivables	$	9,665	$	15,488
Long-term contracts:
Billed		111,256		146,619
Unbilled		243,759		241,726
Allowance for doubtful accounts		(412)		(326)
Total accounts receivable		364,268		403,507
Less estimated amounts not currently due		(19,562)		(20,926)
Current accounts receivable	$	344,706	$	382,581

Components of inventories

Inventories consist of the following (in thousands):

	March 31,		September 30,
	2017		2016
Finished products	$	9,461	$	10,018
Work in process and inventoried costs under long-term contracts		101,551		62,570
Materials and purchased parts		9,448		12,102
Customer advances		(6,596)		(18,328)
Net inventories	$	113,864	$	66,362