Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Activities:
Net income	$ 148	$ 1,310
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	1,804	1,756
Stock-based compensation	1,393	1,231
Payment of contingent consideration obligations in excess of acquisition-date value	(608)	(2,041)
Contingent consideration gain		(35)
Deferred taxes	(194)	310
Gain on strategic investment		(7)
Provision for bad debts	(27)	63
Other	50	12
Change in operating assets and liabilities:
Accounts receivable and contract asset	1,726	(762)
Inventories	(413)	(161)
Prepaids and other	(800)	(649)
Accounts payable	529	190
Accrued liabilities	(3,112)	(3,737)
Income taxes	(59)	(496)
Deferred revenue	(1,346)	(2,389)
Net cash used in operating activities	(909)	(5,405)
Investing Activities:
Purchases of property and equipment	(1,671)	(2,066)
Purchases of available-for-sale securities	(21,758)	(10,098)
Maturities of available-for-sale securities	7,425	20,000
Cash received from sale of strategic investment		7
Net cash (used in) provided by investing activities	(16,004)	7,843
Financing Activities:
Issuance of common stock	91	36
Payments for taxes related to net share settlement of equity awards	(1,964)	(2,661)
Payment of contingent consideration obligations	(2,592)	(9,064)
Net cash used in financing activities	(4,465)	(11,689)
Effect of exchange rate changes on cash and cash equivalents	23	(15)
Net change in cash and cash equivalents	(21,355)	(9,266)
Cash and Cash Equivalents:
Beginning of period	30,361	23,668
End of period	9,006	14,402
Supplemental Information:
Cash paid for income taxes	4	3
Noncash transactions from investing and financing activities:
Acquisition of property and equipment, net of refundable credits in other current assets and liabilities	$ 167	$ 147