Annual report pursuant to Section 13 and 15(d)

Note 4 - Balance Sheet Components (Details Textual)

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Note 4 - Balance Sheet Components (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Cash and Cash Equivalents, at Carrying Value, Ending Balance $ 83,843 $ 92,367
CHINA    
Cash and Cash Equivalents, at Carrying Value, Ending Balance $ 4,100