CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net loss	$ (4,648)	$ (2,734)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	6,445	6,403
Stock-based compensation	4,714	3,483
Amortization of premium on marketable securities	274	336
Undistributed (earnings) losses of equity method investments	(159)	532
Deferred income tax benefit	(3,797)	(4,107)
Loss on disposal of long-lived assets	0	2
Changes in operating assets and liabilities, net of acquisitions and disposals:
Accounts receivable	218	4,973
Inventories	119	(236)
Prepaid expenses and other current assets	(1,697)	1,754
Accounts payable	(7,639)	2,117
Deferred revenue	8,872	705
Accrued warranty and retrofit costs	(305)	(290)
Accrued compensation and benefits	(10,059)	(9,333)
Accrued restructuring costs	(407)	519
Accrued expenses and other current liabilities	(4,308)	(1,089)
Net cash (used in) provided by operating activities	(12,377)	3,035
Cash flows from investing activities
Purchases of property, plant and equipment	(2,486)	(1,576)
Purchases of marketable securities	(12,901)	(22,269)
Sales and maturities of marketable securities	135,873	32,201
Disbursement for a loan receivable	300	0
Acquisitions, net of cash acquired	(125,498)	(15,428)
Purchases of other investments	0	(2,500)
Net cash used in investing activities	(5,312)	(9,572)
Cash flows from financing activities
Principal repayments of capital lease obligations	0	(121)
Common stock dividends paid	(6,844)	(6,731)
Net cash used in financing activities	(6,844)	(6,852)
Effects of exchange rate changes on cash and cash equivalents	(617)	(2,966)
Net decrease in cash and cash equivalents	(25,150)	(16,355)
Cash and cash equivalents, beginning of period	80,722	94,114
Cash and cash equivalents, end of period	$ 55,572	$ 77,759