Note 16 - Loans and Line of Credit 2 (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Short-Term Debt	$ 79,000	$ 58,600
Chao Yang Tongmei High Purity Semiconductor Materials Co Ltd. [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtCurrent
HERE	900
Chao Yang Tongmei High Purity Semiconductor Materials Co Ltd. [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Long-Term Line of Credit, Noncurrent	4,400
ChaoYang XinMei [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtCurrent
HERE	3,300
ChaoYang XinMei [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent
HERE	1,300
Chao Yang Jin Mei Gallium [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtCurrent
Short-Term Debt	200
Chao Yang Jin Mei Gallium [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtCurrent \| Unsecured Bank Loans [Member]
Short-Term Debt	60
Chao Yang Jin Mei Gallium [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtCurrent \| Bank Loan Agreement [Member]
Short-Term Debt	700
Chao Yang Jin Mei Gallium [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Long-Term Debt	400
Chao Yang Jin Mei Gallium [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent \| Unsecured Bank Loans [Member]
Long-Term Debt	2,900
Chao Yang Jin Mei Gallium [Member] \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent \| Bank Loan Agreement [Member]
Long-Term Debt	$ 6,400