Note 4 - Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Thousands			12 Months Ended
		Jan. 18, 2023 shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Jan. 17, 2023 shares
Cash and Cash Equivalents, at Carrying Value, Total			$ 4,391	$ 7,173
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance			0
Accounts Receivable, Allowance for Credit Loss, Ending Balance			1,760	0
Other than Temporary Impairment Losses, Investments			$ 596	0
Finite-Lived Intangible Asset, Useful Life (Year)			3 years 6 months 3 days
Asset Impairment Charges, Total			$ 2,120	$ 0
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.001	$ 0.001
Common Stock, Shares Authorized (in shares) | shares			20,000,000	20,000,000
Common Stock, Shares, Issued (in shares) | shares	[1]		7,174,506	7,075,506
Common Stock, Shares, Outstanding, Ending Balance (in shares) | shares	[1]		7,174,506	7,075,506
Contract with Customer, Asset, after Allowance for Credit Loss, Total			$ 0
Contract with Customer, Performance Obligation Satisfied in Previous Period			0	$ 0
Research and Development Expense, Total			229	326
Short-term Lease Liability			101	152
Operating Lease, Right-of-Use Asset			1,761	2,019
Operating Lease, Liability, Total			1,882
Other Current Assets [Member]
Operating Lease, Right-of-Use Asset			1,760	2,020
Other Current Liabilities [Member]
Operating Lease, Liability, Total			$ 1,880	2,110
Subsequent Event [Member]
Common Stock, Shares Authorized (in shares) | shares		20,000,000			100,000,000
Stock Issued During Period, Fractional Shares, Reverse Stock Splits (in shares) | shares		0
Common Stock, Shares, Issued (in shares) | shares		7,174,506			35,827,677
Common Stock, Shares, Outstanding, Ending Balance (in shares) | shares		7,174,506			35,827,677
Reverse Stock Split [Member] | Subsequent Event [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		5
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)			1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)			8 years
Purchased Software and Software Platform [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			3 years
Purchased Software and Software Platform [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			10 years
Variable Interest Entity, Primary Beneficiary [Member]
Cash and Cash Equivalents, at Carrying Value, Total			$ 578	181
Short-term Lease Liability			101	110
Operating Lease, Right-of-Use Asset			145	21
Subsidiaries [Member] | Subsidiary's Payment on Behalf of Parent to Satisfy Shareholder loans Obligation [Member]
Related Party Transaction, Amounts of Transaction			480
Subsidiaries [Member] | Cash Transfer [Member]
Related Party Transaction, Amounts of Transaction				16,330
Subsidiaries [Member] | Capital Contributions [Member]
Related Party Transaction, Amounts of Transaction				5,000
Subsidiaries [Member] | Shareholder Loans [Member]
Related Party Transaction, Amounts of Transaction				11,330
Subsidiaries [Member] | Shareholder Loans Converted to Capital Contribution [Member]
Related Party Transaction, Amounts of Transaction			2,000
Subsidiaries [Member] | Subsidiary, Loan to Variable Entity Interests (VIEs) [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Related Party Transaction, Amounts of Transaction			340	4,250
Scenario, Plan [Member]
Dividends, Common Stock, Cash			0
UNITED STATES
Cash and Cash Equivalents, at Carrying Value, Total			1,660
CHINA
Cash and Cash Equivalents, at Carrying Value, Total			2,730
CHINA | PRC Subsidiary And VIE's [Member] | Cash Transfer [Member]
Related Party Transaction, Amounts of Transaction			$ 0	$ 0

[1] Retrospectively restated for effect of the 1-for-5 reverse stock split on January 18, 2023, see Note 4(l).