Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities:
Net income	$ 4,069	$ 4,038
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	5,390	5,462
Stock-based compensation	4,037	3,509
Payment of contingent consideration obligations in excess of acquisition-date value	(608)	(2,041)
Contingent consideration gain		(248)
Deferred taxes	592	(979)
Losses (gains) on strategic investments	479	(7)
Provision for bad debts	30	142
Other	176	(11)
Change in operating assets and liabilities:
Accounts receivable and contract asset	4,303	(1,009)
Inventories	(1,333)	(148)
Prepaids and other	(432)	(2,184)
Accounts payable	(489)	(219)
Accrued liabilities	116	(5,143)
Income taxes	(4,105)	196
Deferred revenue	471	(5,840)
Net cash provided by (used in) operating activities	12,696	(4,482)
Investing Activities:
Purchases of property and equipment	(2,627)	(4,135)
Purchases of available-for-sale securities	(45,766)	(26,117)
Maturities of available-for-sale securities	46,522	51,458
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	(1,871)	21,223
Financing Activities:
Issuance of common stock	1,169	277
Payments for taxes related to net share settlement of equity awards	(2,385)	(2,688)
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	(4,808)	(11,475)
Effect of exchange rate changes on cash and cash equivalents	8	(18)
Net change in cash and cash equivalents	6,025	5,248
Cash and Cash Equivalents:
Beginning of period	30,361	23,668
End of period	36,386	28,916
Supplemental Information:
Cash paid for income taxes	9	155
Noncash transactions from investing and financing activities:
Acquisition of property and equipment, net of refundable credits in other current assets and liabilities	395	$ 180
Right of use assets obtained in exchange for new operating lease liabilities	$ 1,012