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Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Net Loss Per Share (Tables) |  |
Net loss attributable to common stockholders | $ (12.0) | $ (15.2)
Denominator: |  |
Weighted-average common shares outstanding | 7,035,510 | 4,216,568
Basic net loss per share | $ (1.71) | $ (3.59)
Numerator: |  |
Net loss attributable to common stockholders, basic | $ (12.0) | $ (15.2)
Effect of dilutive securities | 0.0 | 0.0
Net loss, diluted | $ (12.0) | $ (15.2)
Denominator: |  |
Weighted average common shares outstanding - basic | 7,035,510 | 4,216,568
Potential common share issuances: |  |
Incremental dilutive shares from equity instruments (treasury stock method) | 0 | 0
Weighted-average common shares outstanding | 7,035,510 | 4,216,568
Diluted net loss per share | $ (1.71) | $ (3.59)

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