BALANCE SHEET COMPONENTS

The following tables reflect the components of significant balance sheet accounts as of December 30, 2017 and September 30, 2017:



	As of
(in thousands)	December 30, 2017			September 30, 2017

Short term investments, available-for-sale⁽¹⁾	$	259,000		$	216,000

Inventories, net:
Raw materials and supplies	$	51,936		$	44,239
Work in process	43,212			40,827
Finished goods	36,341			61,596
	131,489			146,662
Inventory reserves	(24,806		)	(24,639		)
	$	106,683		$	122,023
Property, plant and equipment, net:
Land	$	2,182		$	2,182
Buildings and building improvements	51,018			50,910
Leasehold improvements	10,142			9,882
Data processing equipment and software	34,957			34,700
Machinery, equipment, furniture and fixtures	71,792			68,143
	170,091			165,817
Accumulated depreciation	(98,371		)	(98,055		)
	$	71,720		$	67,762
Accrued expenses and other current liabilities:
Wages and benefits	$	24,932		$	47,411
Accrued customer obligations ⁽²⁾	26,461			50,497
Commissions and professional fees	7,045			8,555
Deferred rent	1,918			1,930
Severance ⁽³⁾	3,555			3,828
Other	16,236			20,093
	$	80,147		$	132,314

(1)

All short-term investments were classified as available-for-sale and were measured at fair value based on level one measurement, or quoted market prices, as defined by ASC 820. As of December 30, 2017 and September 30, 2017, fair value approximated the cost basis for short-term investments. The Company did not recognize any realized gains or losses on the sale of investments during the three months ended December 30, 2017 and December 31, 2016.


(2)	Represents customer advance payments, customer credit program, accrued warranty expense and accrued retrofit obligations.


(3)	Includes the restructuring plan discussed in Note 2, severance payable in connection with the November 2017 departure of the Company's CFO of $1.2 million, and other severance payments.