Note O - Income Taxes (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended			37 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2011	Dec. 31, 2019
Deferred Tax Assets, Operating Loss Carryforwards, Total	$ 47,901	$ 44,448
Deferred Tax Assets, in Process Research and Development	10,505	9,879
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	4,599	4,599
Deferred Tax Assets, Valuation Allowance	$ 69,680	$ 57,721	$ 43,462		$ 25,736
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Unrecognized Tax Benefits, Ending Balance	$ 181	$ 181	$ 181		$ 181
Income Tax Examination, Penalties and Interest Accrued, Total	0	0	0
Effective Income Tax Rate Reconciliation, PPP Loan Forgiveness, Amount	0	(1,308)	0
Undistributed Earnings of Foreign Subsidiaries	0
Global Technology, Inc. [Member]
Income Tax Holiday, Aggregate Dollar Amount	$ 0	$ 0	$ 1,400
Income Tax Holiday, Income Tax Benefits Per Share (in dollars per share)	$ 0.00	$ 0.00	$ 0.05
State Administration of Taxation, China [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	25.00%
State Administration of Taxation, China [Member] | Global Technology, Inc. [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				15.00%
TAIWAN
Operating Loss Carryforwards	$ 72,500
Operating Loss Carryforwards, Carryforward Period (Year)	10 years
CHINA
Operating Loss Carryforwards	$ 58,800
Operating Loss Carryforwards, Carryforward Period (Year)	10 years
Domestic Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Total	$ 111,500
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	32,700
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 78,800
Open Tax Year	2019 2020 2021
State and Local Jurisdiction [Member]
Deferred Tax Assets, in Process Research and Development	$ 10,500
Open Tax Year	2019 2020 2021
Foreign Tax Authority [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 4,600
Open Tax Year	2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021