CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Current assets
Cash and cash equivalents	$ 62,162	$ 80,722
Marketable securities	66	70,021
Accounts receivable, net	104,225	86,448
Inventories	100,738	100,619
Deferred tax assets	3,819	17,609
Assets held for sale	2,895	2,900
Prepaid expenses and other current assets	21,801	15,158
Total current assets	295,706	373,477
Property, plant and equipment, net	54,957	41,855
Long-term marketable securities	6,059	63,287
Long-term deferred tax assets	756	70,476
Goodwill	202,347	121,408
Intangible assets, net	89,495	55,446
Equity method investments	25,093	24,308
Other assets	9,982	9,397
Total assets	684,395	759,654
Current liabilities
Accounts payable	39,303	44,890
Deferred revenue	34,419	17,886
Accrued warranty and retrofit costs	5,735	6,089
Accrued compensation and benefits	17,311	20,401
Accrued restructuring costs	7,389	2,073
Accrued income taxes payable	6,356	6,111
Deferred tax liabilities	335	1,251
Accrued expenses and other current liabilities	17,508	15,550
Total current liabilities	128,356	114,251
Long-term tax reserves	2,989	3,644
Long-term deferred tax liabilities	8,052	3,196
Long-term pension liabilities	3,181	3,118
Other long-term liabilities	3,863	3,400
Total liabilities	$ 146,441	$ 127,609
Commitments and contingencies (Note 18)
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, 82,078,175 shares issued and 68,616,306 shares outstanding at March 31, 2016; 81,093,052 shares issued and 67,631,183 shares outstanding at September 30, 2015	821	811
Additional paid-in capital	1,849,655	1,846,357
Accumulated other comprehensive income	10,823	5,898
Treasury stock at cost- 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(1,122,389)	(1,020,065)
Total stockholders' equity	537,954	632,045
Total liabilities and stockholders' equity	$ 684,395	$ 759,654