Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980

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

Note 6 - Leases (Details Textual) $ in Millions	12 Months Ended
Note 6 - Leases (Details Textual) $ in Millions	Dec. 31, 2022 USD ($) ft²	Dec. 31, 2021 USD ($)	Jun. 30, 2020
Operating Lease, Payments \| $	$ 1.3	$ 1.4
HONG KONG
Area of Land (Square Foot)	7,300
Rolling Hills Estates [Member]
Area of Land (Square Foot)	4,900
Lessee, Operating Lease, Renewal Term (Year)			5 years
Richmond, British Columbia [Member]
Area of Land (Square Foot)	1,600
Metuchen, New Jersey [Member]
Area of Land (Square Foot)	2,000
CHINA
Lessee, Number of Branches	7