Revenue, Performance Obligations, Deferred Revenue and Deferred Costs - Schedule of Subscription and Transaction Fees Disaggregated by Customer Category (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total subscription and transaction fees	$ 39,080	$ 25,999	$ 74,260	$ 48,423
Subscription and Transaction Fees
Disaggregation Of Revenue [Line Items]
Total subscription and transaction fees	32,964	20,444	61,512	38,614
Subscription and Transaction Fees \| Small-to-midsize Business and Accounting Firm Customers
Disaggregation Of Revenue [Line Items]
Total subscription and transaction fees	30,263	18,092	56,433	34,422
Subscription and Transaction Fees \| Financial Institution Customers
Disaggregation Of Revenue [Line Items]
Total subscription and transaction fees	$ 2,701	$ 2,352	$ 5,079	$ 4,192

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration