Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Operating Activities:
Net (loss) income	$ (1,536)	$ (27,274)	$ 4,237
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Depreciation and amortization	8,522	9,142	8,017
Stock-based compensation	7,605	7,057	5,863
Noncash lease expense	652	529	308
Amortization of debt issuance costs	365	46	46
Provision for credit losses	37	5	(11)
Contingent consideration (gain) expense	(829)	12	3
Deferred taxes	(181)	5,268	1,651
Other	115	268	132
Change in operating assets and liabilities
Accounts receivable and contract assets	(977)	(1,522)	(2,480)
Inventories	(3,020)	(5,060)	(818)
Prepaids and other		(665)	(2,391)
Accounts payable	(183)	1,608	264
Accrued liabilities	(1,024)	132	1,406
Income taxes	3,438	(1,069)	210
Deferred revenue	(2,470)	(5,700)	(1,048)
Net cash provided by (used in) operating activities	10,514	(17,223)	15,389
Investing Activities:
Purchases of property and equipment	(2,918)	(3,370)	(5,279)
Payment for acquisition of intangible assets			(1,000)
Purchases of available-for-sale securities	(3,904)		(22,723)
Maturities of available-for-sale securities		9,600	43,317
Purchase of business, net of acquired cash			(39,553)
Net cash (used in) provided by investing activities	(6,822)	6,230	(25,238)
Financing Activities:
Proceeds from short-term borrowings			10,000
Payments on short-term borrowings	(10,000)
Proceeds from issuance of long-term debt	29,664
Payment of debt issuance costs	(614)
Issuance of common stock	1,252	1,246	3,128
Payments for taxes related to net share settlement of equity awards	(918)	(1,121)	(2,751)
Payments for acquisition of in-process research and development	(978)	(500)	(150)
Net cash provided by (used in) financing activities	18,406	(375)	10,227
Effect of exchange rate changes on cash	323	(787)	(10)
Net change in cash and cash equivalents	22,421	(12,155)	368
Cash and Cash Equivalents:
Beginning of year	18,998	31,153	30,785
End of year	41,419	18,998	31,153
Supplemental Information:
Cash paid for income taxes	2,851	416	160
Cash paid for interest	2,919	415	74
Noncash financing and investing activities:
Acquisition of property and equipment, net of refundable credits in other current assets and liabilities	$ 116	70	211
Right-of-use assets obtained in exchange for new operating lease liabilities		$ 1,725	234
Deferred and contingent consideration assumed in business acquisition			$ 4,071