CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 5,035	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	6,429	5,715
Amortization of intangible assets	4,525	3,352
Depreciation and amortization	555	774
Amortization of investment premiums & other	1,109	315
Accretion and amortization on debt securities	3,453	1,147
Net changes in estimated fair value of acquisition-related contingent consideration	(780)	0
Deferred taxes	(92)	(464)
Changes in assets and liabilities:
Accounts receivable	(6,171)	1,444
Contract assets	345	2,177
Other assets	498	(1,474)
Accounts payable	2,440	(1,047)
Accrued payroll and related taxes	(4,693)	(1,305)
Deferred revenue	(3,126)	2,379
Other liabilities	159	(138)
Net cash provided by operating activities	9,686	16,061
Investing activities:
Purchases of investments	(47,818)	(147,524)
Sales and maturities of investments	173,316	23,441
Acquisitions, net of cash acquired	(126,607)	0
Purchases of property and equipment	(634)	(660)
Net cash used in investing activities	(1,743)	(124,743)
Financing activities:
Proceeds from the issuance of convertible senior notes	0	155,250
Payment for convertible senior notes issuance costs	0	(5,513)
Purchase of 2026 convertible senior notes hedge	0	(33,192)
Proceeds from issuance of convertible senior notes warrants	0	23,909
Proceeds from the issuance of equity plan common stock	1,128	2,751
Repurchases and retirements of common stock	(14,828)	0
Payment of acquisition-related contingent consideration	0	(782)
Proceeds from other borrowings	0	251
Principal payments on other borrowings	(36)	(39)
Net cash provided by (used in) financing activities	(13,736)	142,635
Foreign currency effect on cash and cash equivalents	(535)	(4)
Net increase (decrease) in cash and cash equivalents	(6,328)	33,949
Cash and cash equivalents at beginning of period	30,312	19,986
Cash and cash equivalents at end of period	23,984	53,935
Supplemental disclosures of cash flow information:
Cash paid for interest	582	172
Cash paid for income taxes	597	373
Supplemental disclosures of non-cash investing and financing activities:
Reclassification of convertible senior notes hedge and embedded conversion derivative to additional paid-in capital	42,821	0
Unrealized holding loss on available for sale investments	$ (1,098)	$ (186)