Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities:
Net income	$ 1,610	$ 2,572
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	3,600	3,575
Stock-based compensation	2,697	2,190
Payment of contingent consideration obligations in excess of acquisition-date value	(608)	(2,041)
Contingent consideration gain		(352)
Deferred taxes	1,388	(213)
Losses (gains) on strategic investments	479	(7)
Provision for bad debts	137	119
Other	108	(10)
Change in operating assets and liabilities:
Accounts receivable and contract asset	1,914	(756)
Inventories	(1,233)	(355)
Prepaids and other	(622)	(1,430)
Accounts payable	(128)	1,273
Accrued liabilities	(1,826)	(4,071)
Income taxes	(3,615)	(291)
Deferred revenue	(2,644)	(4,141)
Net cash provided by (used in) operating activities	1,257	(3,938)
Investing Activities:
Purchases of property and equipment	(2,311)	(3,118)
Purchases of available-for-sale securities	(35,863)	(20,085)
Maturities of available-for-sale securities	27,425	37,458
Cash proceeds from sales of property and equipment		10
Cash received from sale of strategic investment		7
Net cash (used in) provided by investing activities	(10,749)	14,272
Financing Activities:
Issuance of common stock	318	264
Payments for taxes related to net share settlement of equity awards	(2,373)	(2,678)
Payment of contingent consideration obligations	(2,592)	(9,064)
Payments for acquisition of in process research and development	(1,000)
Net cash used in financing activities	(5,647)	(11,478)
Effect of exchange rate changes on cash and cash equivalents	(14)	(54)
Net change in cash and cash equivalents	(15,153)	(1,198)
Cash and Cash Equivalents:
Beginning of period	30,361	23,668
End of period	15,208	22,470
Supplemental Information:
Cash paid for income taxes	6	150
Noncash transactions from investing and financing activities:
Acquisition of property and equipment, net of refundable credits in other current assets and liabilities	87	$ 65
Right of use assets obtained in exchange for new operating lease liabilities	$ 597