Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net income (loss)		$ 4,038	$ (2,704)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization		5,462	4,711
Stock-based compensation		3,509	3,297
Payment of contingent consideration obligations in excess of acquisition-date value		(2,041)
Contingent consideration gain		(248)	(1,006)
Unrealized foreign exchange gain			(74)
Acquired in-process research and development			7,888
Deferred taxes	[1]	(979)	(1,954)
Gain on strategic investment		(7)	(177)
Provision for bad debts		142	33
Other		(11)	19
Change in operating assets and liabilities:
Accounts receivable and contract asset	[1]	(1,009)	(1,142)
Inventories		(148)	(465)
Prepaids and other		(2,184)	(2,107)
Accounts payable		(219)
Accrued liabilities		(5,143)	870
Deferred revenue	[1]	(5,840)	22,902
Income taxes	[1]	196	(869)
Net cash (used in) provided by operating activities		(4,482)	29,222
Investing Activities:
Purchases of property and equipment		(4,135)	(6,915)
Purchases of available-for-sale securities		(26,117)	(59,578)
Maturities of available-for-sale securities		51,458	56,581
Cash proceeds from sales of property and equipment		10	4
Cash received from sale of strategic investment		7	177
Purchase of in-process research and development (Note 15)			4,500
Net cash provided by (used in) investing activities		21,223	(14,231)
Financing Activities:
Issuance of common stock		277	1,387
Payments for taxes related to net share settlement of equity awards		(2,688)	(4,356)
Payment of contingent consideration obligations		(9,064)	(925)
Net cash used in financing activities		(11,475)	(3,894)
Effect of exchange rate changes on cash, restricted cash and cash equivalents		(18)	(8)
Net change in cash, restricted cash and cash equivalents		5,248	11,089
Cash, Restricted Cash and Cash Equivalents:
Beginning of period		23,668	16,534
End of period		28,916	27,623
Supplemental Information:
Cash paid for income taxes		155	893
Noncash transactions from investing and financing activities:
Acquisition of property and equipment, net of refundable credits in other current assets and liabilities		$ 180	965
Accrued taxes related to net share settlement of equity awards			$ 3,388

[1] Amounts presented are net of impact from adoption of ASC Topic 606.