CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Current assets
Cash and cash equivalents	$ 55,572	$ 80,722
Marketable securities	41	70,021
Accounts receivable, net	102,889	86,448
Inventories	99,894	100,619
Deferred tax assets	18,917	17,609
Assets held for sale	2,869	2,900
Prepaid expenses and other current assets	16,856	15,158
Total current assets	297,038	373,477
Property, plant and equipment, net	54,719	41,855
Long-term marketable securities	9,614	63,287
Long-term deferred tax assets	58,617	70,476
Goodwill	202,347	121,408
Intangible assets, net	93,287	55,446
Equity method investments	23,814	24,308
Other assets	9,598	9,397
Total assets	749,034	759,654
Current liabilities
Accounts payable	38,812	44,890
Deferred revenue	28,245	17,886
Accrued warranty and retrofit costs	5,767	6,089
Accrued compensation and benefits	14,494	20,401
Accrued restructuring costs	1,654	2,073
Accrued income taxes payable	4,880	6,111
Deferred tax liabilities	1,154	1,251
Accrued expenses and other current liabilities	21,149	15,550
Total current liabilities	116,155	114,251
Long-term tax reserves	2,953	3,644
Long-term deferred tax liabilities	2,917	3,196
Long-term pension liabilities	3,115	3,118
Other long-term liabilities	3,660	3,400
Total liabilities	$ 128,800	$ 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, 81,901,445 shares issued and 68,439,576 shares outstanding at December 31, 2015; 81,093,052 shares issued and 67,631,183 shares outstanding at September 30, 2015	819	811
Additional paid-in capital	1,846,863	1,846,357
Accumulated other comprehensive income	5,074	5,898
Treasury stock at cost- 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(1,031,566)	(1,020,065)
Total stockholders' equity	620,234	632,045
Total liabilities and stockholders' equity	$ 749,034	$ 759,654