Note O - Income Taxes (Details Textual) - USD ($) $ / shares in Thousands, $ in Thousands	12 Months Ended			37 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Nov. 30, 2011	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Operating Loss Carryforwards	$ 49,469	$ 47,901
Deferred Tax Assets, in Process Research and Development	10,998	10,505
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	4,599	4,599
Deferred Tax Assets, Valuation Allowance	$ 78,124	69,680	$ 69,680		$ 57,721	$ 43,462
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits, Ending Balance	$ 181	181	181		181
Income Tax Examination, Penalties and Interest Accrued, Total		0			$ 0
Effective Income Tax Rate Reconciliation, PPP Loan Forgiveness, Amount	0	0	(1,308)
Undistributed Earnings of Foreign Subsidiaries		0
Global Technology, Inc. [Member]
Income Tax Holiday, Aggregate Dollar Amount	$ 0	$ 0	$ 0
Income Tax Holiday, Income Tax Benefits Per Share (in dollars per share)	$ 0	$ 0	$ 0
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	$ 73,700
Operating Loss Carryforwards, Carryforward Period (Year)	10 years
CHINA
Operating Loss Carryforwards	$ 66,900
Operating Loss Carryforwards, Carryforward Period (Year)	10 years
Domestic Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards	$ 112,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	32,700
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 79,300
Open Tax Year	2020 2021 2022 2023
State and Local Jurisdiction [Member]
Deferred Tax Assets, in Process Research and Development	$ 11,000
Open Tax Year	2020 2021 2022 2023
Foreign Tax Authority [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 4,600
Open Tax Year	2018 2019 2020 2021 2022 2023