CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Current assets
Cash and cash equivalents	$ 117,081	$ 85,086
Marketable securities	12	39
Accounts receivable, net	120,752	106,372
Inventories	105,304	92,572
Prepaid expenses and other current assets	22,215	15,265
Total current assets	365,364	299,334
Property, plant and equipment, net	52,949	54,885
Long-term marketable securities	2,565	6,096
Long-term deferred tax assets	1,460	1,982
Goodwill	210,609	202,138
Intangible assets, net	75,458	81,843
Equity method investments	32,628	27,273
Other assets	5,738	12,354
Total assets	746,771	685,905
Current liabilities
Accounts payable	49,991	41,128
Deferred revenue	33,062	14,966
Accrued warranty and retrofit costs	7,646	6,324
Accrued compensation and benefits	21,718	21,254
Accrued restructuring costs	1,690	5,939
Accrued income taxes payable	10,466	7,554
Accrued expenses and other current liabilities	20,686	22,628
Total current liabilities	145,259	119,793
Long-term tax reserves	1,782	2,681
Long-term deferred tax liabilities	2,950	2,913
Long-term pension liabilities	2,469	2,557
Other long-term liabilities	4,539	4,271
Total liabilities	156,999	132,215
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, 83,216,169 shares issued and 69,754,300 shares outstanding at June 30, 2017, 82,220,270 shares issued and 68,758,401 shares outstanding at September 30, 2016	832	821
Additional paid-in capital	1,867,645	1,855,703
Accumulated other comprehensive income	15,000	15,166
Treasury stock, at cost- 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(1,092,749)	(1,117,044)
Total stockholders' equity	589,772	553,690
Total liabilities and stockholders' equity	$ 746,771	$ 685,905