Restatement - Statements of Operations and Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Revenue
Total revenue	$ 34,714	$ 28,773	$ 67,186	$ 54,748
Operating costs and expenses
Selling and marketing	9,206	8,530	17,644	15,915
Research and development	8,236	6,691	15,842	12,855
General and administrative	6,073	5,718	12,037	10,776
Acquisition-related costs and expenses	4,385	1,659	6,664	3,352
Total operating costs and expenses	31,210	26,390	58,853	50,828
Operating income	3,504	2,383	8,333	3,920
Interest expense	2,040	1,319	4,048	1,319
Other income (expense), net	(231)	372	(96)	468
Income before income taxes	1,233	1,436	4,189	3,069
Income tax provision (benefit)	(220)	(417)	(52)	117
Net income	$ 1,013	$ 1,019	$ 4,137	$ 3,186
Net income per share – basic (in dollars per share)	$ 0.02	$ 0.02	$ 0.09	$ 0.07
Net income per share – diluted (in dollars per share)	$ 0.02	$ 0.02	$ 0.09	$ 0.07
Shares used in calculating net income per share – basic (in shares)	44,775	43,138	44,795	42,835
Shares used in calculating net income per share – diluted (in shares)	46,097	44,554	46,206	44,367
Comprehensive income (loss)
Net income	$ 1,013	$ 1,019	$ 4,137	$ 3,186
Foreign currency translation adjustment	(1,862)	(2,648)	(3,129)	112
Unrealized holding loss on available for sale investments	(828)	(133)	(1,098)	(186)
Comprehensive income (loss)	(1,677)	(1,762)	(90)	3,112
Software and hardware
Revenue
Total revenue	19,280	13,013	34,725	25,315
Operating costs and expenses
Cost of revenue	310	670	688	1,915
Services and other
Revenue
Total revenue	15,434	15,760	32,461	29,433
Operating costs and expenses
Cost of revenue	3,000	$ 3,122	5,978	$ 6,015
As Previously Reported
Revenue
Total revenue	34,714		67,186
Operating costs and expenses
Selling and marketing	9,206		17,644
Research and development	8,236		15,842
General and administrative	6,073		12,037
Acquisition-related costs and expenses	3,056		5,335
Total operating costs and expenses	29,881		57,524
Operating income	4,833		9,662
Interest expense	2,040		4,048
Other income (expense), net	(231)		(96)
Income before income taxes	2,562		5,518
Income tax provision (benefit)	(651)		(483)
Net income	$ 1,911		$ 5,035
Net income per share – basic (in dollars per share)	$ 0.04		$ 0.11
Net income per share – diluted (in dollars per share)	$ 0.04		$ 0.11
Shares used in calculating net income per share – basic (in shares)	44,775		44,795
Shares used in calculating net income per share – diluted (in shares)	46,097		46,206
Comprehensive income (loss)
Net income	$ 1,911		$ 5,035
Foreign currency translation adjustment	(1,862)		(3,129)
Unrealized holding loss on available for sale investments	(828)		(1,098)
Comprehensive income (loss)	(779)		808
As Previously Reported | Software and hardware
Revenue
Total revenue	19,280		34,725
Operating costs and expenses
Cost of revenue	310		688
As Previously Reported | Services and other
Revenue
Total revenue	15,434		32,461
Operating costs and expenses
Cost of revenue	3,000		5,978
Total Adjustments
Revenue
Total revenue	0		0
Operating costs and expenses
Selling and marketing	0		0
Research and development	0		0
General and administrative	0		0
Acquisition-related costs and expenses	1,329		1,329
Total operating costs and expenses	1,329		1,329
Operating income	(1,329)		(1,329)
Interest expense	0		0
Other income (expense), net	0		0
Income before income taxes	(1,329)		(1,329)
Income tax provision (benefit)	431		431
Net income	$ (898)		$ (898)
Net income per share – basic (in dollars per share)	$ (0.02)		$ (0.02)
Net income per share – diluted (in dollars per share)	$ (0.02)		$ (0.02)
Shares used in calculating net income per share – basic (in shares)	0		0
Shares used in calculating net income per share – diluted (in shares)	0		0
Comprehensive income (loss)
Net income	$ (898)		$ (898)
Foreign currency translation adjustment	0		0
Unrealized holding loss on available for sale investments	0		0
Comprehensive income (loss)	(898)		(898)
Total Adjustments | Software and hardware
Revenue
Total revenue	0		0
Operating costs and expenses
Cost of revenue	0		0
Total Adjustments | Services and other
Revenue
Total revenue	0		0
Operating costs and expenses
Cost of revenue	$ 0		$ 0