Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Operating Activities:
Net (loss) income	$ (27,274)	$ 4,237	$ 1,123
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	9,142	8,017	7,263
Stock-based compensation	7,057	5,863	5,453
Noncash lease expense	529	308	246
Provision for credit losses	5	(11)	73
Deferred taxes	5,268	1,651	(1,139)
Payment of contingent consideration obligations in excess of acquisition-date value			(608)
Loss on strategic investment			479
Other	326	181	5
Change in operating assets and liabilities
Accounts receivable and contract assets	(1,522)	(2,480)	3,461
Inventories	(5,060)	(818)	(1,377)
Prepaids and other	(665)	(2,391)	410
Accounts payable	1,608	264	(483)
Accrued liabilities	132	1,406	1,847
Income taxes	(1,069)	210	(1,558)
Deferred revenue	(5,700)	(1,048)	(1,185)
Net cash (used in) provided by operating activities	(17,223)	15,389	14,010
Investing Activities:
Purchases of property and equipment	(3,370)	(5,279)	(3,671)
Payment for acquisition of intangible assets		(1,000)
Purchases of available-for-sale securities		(22,723)	(59,917)
Sales and maturities of available-for-sale securities	9,600	43,317	54,522
Purchase of business, net of acquired cash		(39,553)
Net cash provided by (used in) investing activities	6,230	(25,238)	(9,066)
Financing Activities:
Proceeds from short-term borrowings		10,000
Issuance of common stock	1,246	3,128	1,615
Payments for taxes related to net share settlement of equity awards	(1,121)	(2,751)	(2,534)
Payment of deferred financing costs			(137)
Payments for acquisition of in-process research and development	(500)	(150)	(1,000)
Payment of contingent consideration obligations			(2,592)
Net cash (used in) provided by financing activities	(375)	10,227	(4,648)
Effect of exchange rate changes on cash	(787)	(10)	128
Net change in cash and cash equivalents	(12,155)	368	424
Cash and Cash Equivalents:
Beginning of year	31,153	30,785	30,361
End of year	18,998	31,153	30,785
Supplemental Information:
Cash paid for income taxes	416	160	30
Cash paid for interest	415	74
Noncash financing and investing activities:
Acquisition of property and equipment and intangible assets, net of refundable credits in other current assets and liabilities	70	211	1,306
Right-of-use assets and property and equipment obtained in exchange for new operating lease liabilities	$ 1,725	234	$ 1,181
Deferred and contingent consideration assumed in business acquisition		$ 4,071