Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Operating Activities:
Net income	$ 3,926	$ 9,985	$ 11,947
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Depreciation and amortization	5,555	4,873	2,805
Stock-based compensation	3,472	3,844	2,381
Contingent consideration (gain) expense	(127)	1,492
Unrealized foreign exchange loss	474	444
Impairment losses on intangible assets	427
Gains on sales of available-for-sale securities, net and strategic investments	(43)	(514)	(492)
Impairment loss on strategic investment			1,500
Deferred taxes	1,000	261	93
Excess tax benefit from stock-based compensation plans			(432)
Property and equipment disposal loss (gain)	6	(66)	(39)
Provision for bad debts	208
Other, net		13
Change in operating assets and liabilities, net of acquisitions and excluding the impact of discontinued operations:
Accounts receivable	(528)	911	(2,727)
Inventories	97	(143)	(162)
Prepaids and other	(599)	409	141
Accounts payable and accrued liabilities	368	3,710	373
Income taxes	(59)	76	(309)
Deferred revenue	(124)	(129)	(13)
Net cash provided by operating activities from continuing operations	14,053	25,166	15,066
Investing Activities:
Purchases of property and equipment	(6,432)	(8,192)	(1,877)
Cash proceeds from sale of property and equipment		89	42
Purchases of available-for-sale securities	(73,671)	(24,517)	(3,376)
Sales and maturities of available-for-sale securities	63,871	2,498	22,199
Payments for acquisition, net of cash acquired		(25,859)	(270)
Cash received from strategic investments	43	513	21
Cash transferred to discontinued operations			(45)
Net cash (used in) provided by investing activities from continuing operations	(16,189)	(55,468)	16,694
Financing Activities:
Issuance of common stock	444	494	710
Repurchase of common stock	(4,702)		(20,000)
Purchases of common stock to pay employee taxes	(2,156)	(388)	(825)
Payment of deferred financing costs	(96)
Excess tax benefit from stock-based compensation plans			432
Payment of contingent consideration		(305)
Net cash used in financing activities from continuing operations	(6,510)	(199)	(19,683)
Effect of exchange rate changes on cash	193	(100)
Net cash (used in) provided by continuing operations	(8,453)	(30,601)	12,077
Discontinued Operations:
Net cash used in operating activities			(45)
Net cash provided by financing activities			45
Net change in cash and cash equivalents	(8,453)	(30,601)	12,077
Cash and Cash Equivalents:
Beginning of year	24,987	55,588	43,511
End of year	16,534	24,987	55,588
Supplemental Information:
Cash paid for income taxes	2,114	6,710	6,510
Noncash financing and investing activities:
Acquisition of property and equipment on account	109	50	22
Contingent consideration and debt assumed in acquisitions		12,584
Issuance of performance shares, restricted and deferred stock units	$ 2,022	1,472	2,250
Accrual of employee taxes on common stock exercises		$ 1,585
Accrual of business combination contingent consideration			$ 305