Fair value measurements and the fair value option - Schedule of Fair Value of Assets Measured on Recurring Basis (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Equity investment in VericiDx	$ 4,322	$ 9,295
Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Equity investment in VericiDx	0	0
Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Equity investment in VericiDx	$ 0	$ 0

Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Name:	us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant