Note 1 - Description of Business (Details Textual) - Manufacturing Facilities in PRC [Member] - Yuhan Optoelectronic Technology Co., Ltd [Member] $ in Millions |
Sep. 15, 2022
USD ($)
|
|---|---|
| Disposal Group, Including Discontinued Operation, Consideration | $ 150 |
| Business Divestiture, Percentage of Equity Interests Exchanged | 10.00% |
| Minimum [Member] | |
| Percentage of Estimated Proceeds From Divestiture of Business | 4.00% |
| Maximum [Member] | |
| Percentage of Estimated Proceeds From Divestiture of Business | 10.00% |