CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Current assets
Cash and cash equivalents	$ 197,708	$ 101,622
Marketable securities	46,281	28
Accounts receivable, net	125,192	93,465
Inventories	96,986	73,397
Prepaid expenses and other current assets	31,741	22,594
Current assets held for sale	66,148	60,671
Total current assets	564,056	351,777
Property, plant and equipment, net	59,988	56,981
Long-term marketable securities	7,237	2,642
Long-term deferred tax assets	43,798	1,692
Goodwill	255,876	207,154
Intangible assets, net	99,956	83,504
Other assets	5,294	6,325
Non-current assets held for sale	59,052	56,553
Total assets	1,095,257	766,628
Current liabilities
Current portion of long term debt	2,000
Accounts payable	55,873	49,100
Deferred revenue	25,884	22,564
Accrued warranty and retrofit costs	6,340	5,479
Accrued compensation and benefits	29,322	23,877
Accrued restructuring costs	659	1,708
Accrued income taxes payable	6,746	11,417
Accrued expenses and other current liabilities	30,405	24,808
Current liabilities held for sale	7,388	7,825
Total current liabilities	164,617	146,778
Long-term debt	194,071
Long-term tax reserves	1,102	1,687
Long-term deferred tax liabilities	7,135	3,748
Long-term pension liabilities	4,255	1,783
Other long-term liabilities	5,547	4,336
Non-current liabilities held for sale	698	652
Total liabilities	377,425	158,984
Commitments and contingencies (Note 22)
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, 84,164,130 shares issued and 70,702,261 shares outstanding at September 30, 2018, 83,294,848 shares issued and 69,832,979 shares outstanding at September 30, 2017	841	833
Additional paid-in capital	1,898,434	1,874,918
Accumulated other comprehensive income	13,587	15,213
Treasury stock, at cost- 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(994,074)	(1,082,364)
Total stockholders' equity	717,832	607,644
Total liabilities and stockholders' equity	$ 1,095,257	$ 766,628