Note 2 - Summary of Significant Accounting Policies (Details Textual)		12 Months Ended
Nov. 20, 2020 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares
Capitalized Contract Cost, Net, Total		$ 0	$ 65,000
Capitalized Contract Cost, Amortization		65,000	53,000
Capitalized Contract Cost, Additions		0
Revenue, Contract Costs		$ 438,000
Operating Lease, Weighted Average Discount Rate, Percent		14.50%
Operating Lease, Impairment Loss		$ 333,000	0
Number of Reporting Units		1
Net Assets, Ending Balance		$ (15,092,000)
Goodwill, Impairment Loss		0	$ 0
Tangible Asset Impairment Charges, Total		$ 0
Stock Issued During Period, Shares, New Issues (in shares) \| shares		1,000,000	15,700,000
Derivative Liability, Current		$ 5,292,000	$ 24,128,000
Deemed Dividend From Issuance of Series D Preferred Stock, Amount		4,201,000	4,201,000
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)		(18,809,000)
Accounts Receivable, Allowance for Credit Loss, Ending Balance		25,000	5,000
Revenues, Total		$ 3,472,000	$ 4,785,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum		57.00%	57.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum		99.00%	99.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum		1.37%	1.37%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum		2.58%	2.58%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%	0.00%
Employee Benefits and Share-based Compensation		$ 1,528,000	$ 862,000
Unrecognized Tax Benefits, Ending Balance		0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total		0	0
Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease), Total		75,000	(151,000)
Advertising Expense		$ 48,000	$ 5,000
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| Three Customer [Member]
Concentration Risk, Percentage		51.00%
Revenues, Total		$ 1,787,000
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| Two Customers [Member]
Concentration Risk, Percentage			61.00%
Revenues, Total			$ 2,921,000
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Three Customer [Member]
Accounts Receivable, after Allowance for Credit Loss, Total		172,000
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Two Customers [Member]
Accounts Receivable, after Allowance for Credit Loss, Total			250,000
Series D Preferred Stock Instrument [Member]
Derivative Liability, Current	$ 26,011,000	$ 5,292,000	$ 24,128,000
Mezzanine Equity Series D Convertible Redeemable Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares	11,560
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Year)		3 years 3 months 29 days	3 years 3 months 29 days
Minimum [Member] \| Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate		5.00%
Minimum [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate		4.10%
Minimum [Member] \| All Other Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate		15.00%
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Year)		5 years 2 months 1 day	5 years 2 months 1 day
Maximum [Member] \| Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate		10.00%
Maximum [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate		10.00%
Maximum [Member] \| All Other Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate		25.00%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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