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Note 12 - Net Loss Per Share of Common Stock - Summary of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Net loss $ (39,151) $ (30,543)
Net loss per share - basic and diluted (in dollars per share) $ (1.95) $ (1.93)
Weighted-average common shares used to compute basic and diluted net loss per share (in shares) 20,070 15,790