Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Statement of Financial Position [Abstract]    
Allowance for accounts receivable $ 19 $ 28
Convertible Preferred stock, par value per share (in dollars per share) $ 0.001 $ 0.001
Convertible Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Convertible Preferred stock, shares issued (in shares) 0 0
Convertible Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value per share (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 141,429,000 141,429,000
Common stock, shares issued (in shares) 12,844,000 12,693,000
Common stock, shares outstanding (in shares) 12,844,000 12,693,000