Note 7 - Prepaid Expenses and Other Current Assets (Details Textual) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Other Receivables	$ 514,000	$ 1,482,000
Big Moment Hong Kong Limited [Member]
Other Receivables	287,000	1,132,000
Accounts Payable, Other	$ 218,000	$ 629,000

Amount of obligations incurred and payable classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant