Annual report pursuant to Section 13 and 15(d)

Net Loss Per Share of Common Stock - Schedule of Earnings Per Share, Basic and Diluted (Details)

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Net Loss Per Share of Common Stock - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Numerator:    
Net loss $ (12,132) $ (26,992)
Adjustment for gain on fair value of warrant liability 0 0
Adjusted net loss used for dilution calculation $ (12,132) $ (26,992)
Denominator    
Weighted-average number of shares outstanding (in shares) 71,911 61,229
Effect of potential dilutive shares (in shares) 0 0
Dilutive weighted-average number of shares outstanding (in shares) 71,911 61,229
Net loss per share    
Basic (in dollars per share) $ (0.17) $ (0.44)
Diluted (in dollars per share) $ (0.17) $ (0.44)