Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Operating Activities:
Net income	$ 9,985	$ 11,947	$ 12,031
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Depreciation and amortization	4,873	2,805	2,715
Gains on sales of available-for-sale securities, net and strategic investments	(514)	(492)	(842)
Impairment losses on strategic investments		1,500	1,184
Stock-based compensation	3,844	2,381	3,337
Contingent consideration accretion and unrealized foreign exchange loss	1,936
Deferred taxes	261	93	(352)
Excess tax benefit from stock-based compensation plans		(432)	(236)
(Gain) loss on disposals of property and equipment	(66)	(39)	2
Loss from discontinued operations			176
Other, net	13
Change in operating assets and liabilities, net of acquisitions and excluding the impact of discontinued operations:
Accounts receivable	911	(2,727)	581
Inventories	(143)	(162)	511
Prepaids and other	409	141	(23)
Accounts payable and accrued liabilities	3,710	373	(738)
Income taxes	76	(309)	116
Deferred revenue	(129)	(13)	75
Net cash provided by operating activities from continuing operations	25,166	15,066	18,537
Investing Activities:
Payments for acquisition, net of cash acquired	(25,859)	(270)
Purchases of property and equipment	(8,192)	(1,877)	(2,278)
Cash proceeds from sale of property and equipment	89	42
Purchases of available-for-sale securities	(24,517)	(3,376)	(138,363)
Sales and maturities of available-for-sale securities	2,498	22,199	162,673
Cash received from strategic investments	513	21	709
Cash transferred to discontinued operations		(45)	(354)
Net cash (used in) provided by investing activities from continuing operations	(55,468)	16,694	22,387
Financing Activities:
Excess tax benefit from stock-based compensation plans		432	236
Issuance of common stock	494	710	512
Repurchase of common stock		(20,000)	(12,545)
Purchases of common stock to pay employee taxes	(388)	(825)	(1,111)
Payment of contingent consideration	(305)
Net cash used in financing activities from continuing operations	(199)	(19,683)	(12,908)
Net cash (used in) provided by continuing operations	(30,501)	12,077	28,016
Discontinued Operations:
Net cash used in operating activities		(45)	(354)
Net cash provided by financing activities		45	354
Effect of exchange rate changes on cash	(100)
Net change in cash and cash equivalents	(30,601)	12,077	28,016
Cash and Cash Equivalents:
Beginning of year	55,588	43,511	15,495
End of year	24,987	55,588	43,511
Supplemental Information:
Cash paid for income taxes	6,710	6,510	6,295
Noncash financing and investing activities:
Acquisition of property and equipment on account	50	22	11
Contingent consideration and debt assumed in acquisitions	12,584		0
Issuance of performance shares, restricted and deferred stock units	$ 1,472	2,250	$ 3,007
Accrual of business combination contingent consideration		$ 305