Summary of Significant Accounting Policies - Cumulative effect of balance sheet changes (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2018
Recently Adopted Accounting Standards
Amortization period of capitalized contract costs	7 years
Assets
Deferred contract costs	$ 32,332	$ 21,677	$ 14,783
Prepaid expenses and other	13,188	13,895	12,978
Long-term deferred contract costs	125,711	81,422	53,324
Long-term prepaid expenses and other	4,917	1,975	2,730
Deferred income tax assets	4,955	6,472	3,749
Stockholders' equity:
Retained earnings	$ 164,272	99,817	45,994
Contract Assets For Implementation Fees related to open contracts, net of deferred taxes | Topic 606
Stockholders' equity:
Retained earnings			2,191
Deferral Of Costs to Obtain a New Contract, net of deferred taxes | Topic 606
Stockholders' equity:
Retained earnings			50,481
Impact from Adoption | Topic 606
Assets
Deferred contract costs		21,677	14,783
Prepaid expenses and other		1,072	1,730
Long-term deferred contract costs		81,422	53,324
Long-term prepaid expenses and other		154	1,226
Deferred income tax assets		(21,635)	(18,391)
Stockholders' equity:
Retained earnings		81,758	$ 52,672
Balances under ASC 605
Assets
Prepaid expenses and other		12,823		$ 11,248
Long-term prepaid expenses and other		1,821		1,504
Deferred income tax assets		28,107		22,140
Stockholders' equity:
Retained earnings		$ 18,059		$ (6,678)