Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net (loss) income	$ (12,546)	$ 4,526
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	6,902	5,610
Stock-based compensation	5,198	4,318
Noncash lease expense	371	223
Provision for credit losses	8	(11)
Deferred taxes	(2,996)	947
Other	257	37
Change in operating assets and liabilities:
Accounts receivable and contract assets	(847)	(1,809)
Inventories	(4,167)	(338)
Prepaids and other	(1,998)	(59)
Accounts payable	349	(27)
Accrued liabilities	(1,039)	(435)
Income taxes	(676)	1,327
Deferred revenue	(3,539)	191
Net cash (used in) provided by operating activities	(14,723)	14,500
Investing Activities:
Purchases of property and equipment	(2,798)	(2,874)
Payment for acquisition of intangible assets		(1,000)
Purchases of available-for-sale securities		(22,799)
Maturities of available-for-sale securities	7,600	43,317
Net cash provided by investing activities	4,802	16,644
Financing Activities:
Issuance of common stock	763	2,627
Payments for taxes related to net share settlement of equity awards	(936)	(2,279)
Payments for acquisition of in-process research and development	(500)	(150)
Net cash (used in) provided by financing activities	(673)	198
Effect of exchange rate changes on cash	(485)	50
Net change in cash and cash equivalents	(11,079)	31,392
Cash and Cash Equivalents:
Beginning of period	31,153	30,785
End of period	20,074	62,177
Supplemental Information:
Cash paid for income taxes	395	35
Cash paid for interest	256
Noncash investing and financing activities:
Acquisition of property and equipment, net of refundable credits in other current assets and liabilities	90	345
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1,732	$ 234