Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 1,875
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	34.00%
APIC, Share-based Payment Arrangement, Recognition and Exercise	$ 437
Net Operating Loss Carryforward Limitation	764
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	$ 0
Share-based Payment Arrangement, Option [Member]
Unrecognized Tax Benefits, Ending Balance	437
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	139,500
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	87
Domestic Tax Authority [Member] | Liquidmetal Golf, Inc [Member]
Operating Loss Carryforwards, Total	$ 29,400
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2014 2015 2016 2017 2018 2019
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Operating Loss Carryforwards, Total	$ 97,300
Open Tax Year	2013 2014 2015 2016 2017 2018 2019
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 243