CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Current assets
Cash and cash equivalents	$ 66,116	$ 80,722
Marketable securities	18	70,021
Accounts receivable, net	101,091	86,448
Inventories	98,157	100,619
Deferred tax assets	3,958	17,609
Assets held for sale	2,806	2,900
Prepaid expenses and other current assets	21,078	15,158
Total current assets	293,224	373,477
Property, plant and equipment, net	54,763	41,855
Long-term marketable securities	6,068	63,287
Long-term deferred tax assets	1,125	70,476
Goodwill	202,386	121,408
Intangible assets, net	85,646	55,446
Equity method investments	26,530	24,308
Other assets	12,579	9,397
Total assets	682,321	759,654
Current liabilities
Accounts payable	41,502	44,890
Deferred revenue	25,522	17,886
Accrued warranty and retrofit costs	5,955	6,089
Accrued compensation and benefits	18,031	20,401
Accrued restructuring costs	5,789	2,073
Accrued income taxes payable	7,168	6,111
Deferred tax liabilities	331	1,251
Accrued expenses and other current liabilities	17,751	15,550
Total current liabilities	122,049	114,251
Long-term tax reserves	2,714	3,644
Long-term deferred tax liabilities	6,962	3,196
Long-term pension liabilities	3,212	3,118
Other long-term liabilities	4,329	3,400
Total liabilities	139,266	127,609
Commitments and contingencies (Note 19)
Stockholders' equity
Preferred stock, $0.01 par value, 1,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock, $0.01 par value, 125,000,000 shares authorized, 82,097,858 shares issued and 68,635,989 shares outstanding at June 30, 2016; 81,093,052 shares issued and 67,631,183 shares outstanding at September 30, 2015	821	811
Additional paid-in capital	1,851,292	1,846,357
Accumulated other comprehensive income	12,598	5,898
Treasury stock at cost- 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(1,120,700)	(1,020,065)
Total stockholders' equity	543,055	632,045
Total liabilities and stockholders' equity	$ 682,321	$ 759,654