CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Current assets
Cash and cash equivalents	$ 82,945	$ 85,086
Marketable securities	866	39
Accounts receivable, net	114,429	106,372
Inventories	92,519	92,572
Prepaid expenses and other current assets	15,431	15,265
Total current assets	306,190	299,334
Property, plant and equipment, net	54,439	54,885
Long-term marketable securities	5,217	6,096
Long-term deferred tax assets	1,683	1,982
Goodwill	210,587	202,138
Intangible assets, net	83,432	81,843
Equity method investments	25,295	27,273
Other assets	5,464	12,354
Total assets	692,307	685,905
Current liabilities
Accounts payable	52,090	41,128
Deferred revenue	24,759	14,966
Accrued warranty and retrofit costs	6,217	6,324
Accrued compensation and benefits	14,255	21,254
Accrued restructuring costs	3,227	5,939
Accrued income taxes payable	7,775	7,554
Accrued expenses and other current liabilities	19,941	22,628
Total current liabilities	128,264	119,793
Long-term tax reserves	2,087	2,681
Long-term deferred tax liabilities	2,307	2,913
Long-term pension liabilities	2,281	2,557
Other long-term liabilities	4,466	4,271
Total liabilities	139,405	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, 82,982,977 shares issued and 69,521,108 shares outstanding at December 31, 2016; 82,220,270 shares issued and 68,758,401 shares outstanding at September 30, 2016	830	821
Additional paid-in capital	1,858,103	1,855,703
Accumulated other comprehensive income	5,063	15,166
Treasury stock at cost - 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(1,110,138)	(1,117,044)
Total stockholders' equity	552,902	553,690
Total liabilities and stockholders' equity	$ 692,307	$ 685,905