Foreign Operations (Details) - USD ($)	Dec. 31, 2020	Jun. 30, 2020
China
Assets	$ 20,900,000	$ 19,000,000
Net assets	17,800,000	16,200,000
Latvia
Assets	9,700,000	9,800,000
Net assets	$ 8,700,000	$ 8,200,000

Carrying amount of total assets less total liabilities of a designated geographic area if disclosed as a concentration risk.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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