Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss, Ending Balance		$ 830	$ 2,340
Accounts Receivable, Allowance for Credit Loss, Writeoff			2,500
Finite-Lived Intangible Asset, Useful Life (Year)		6 years 197 days
Asset Impairment Charges, Total		$ 0	0
Contract with Customer, Performance Obligation Satisfied in Previous Period		0	0
Contract with Customer, Asset, after Allowance for Credit Loss, Total		0
Research and Development Expense, Total		539	869
Short-term Lease Liability		203	136
Operating Lease, Right-of-Use Asset	[1]	48	12
Operating Lease, Liability, Total		50
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total		0	0
Unrecognized Tax Benefits, Ending Balance		0	0
Other Current Assets [Member]
Operating Lease, Right-of-Use Asset		50	10
Other Current Liabilities [Member]
Operating Lease, Liability, Total		$ 50	$ 10
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)		146 days
Minimum [Member] | Long Term Loan, Business Entities, Collateralized Basis [Member]
Debt Instrument, Term (Year)		1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)		3 years
Maximum [Member] | Long Term Loan, Business Entities, Collateralized Basis [Member]
Debt Instrument, Term (Year)		5 years
Purchased Software and Software Platform [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		2 years
Purchased Software and Software Platform [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		10 years

[1] All of the VIEs' assets can be used to settle obligations of their primary beneficiary. Liabilities recognized as a result of consolidating these VIEs do not represent additional claims on the Company's general assets (Note 2).