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Net Loss per Share - Computation of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Earnings Per Share [Abstract]
Net loss	$ (9,794)	$ (7,384)	$ (18,165)	$ (15,857)	$ (32,800)
Weighted average common shares used in net loss per share attributable to common stockholders, basic and diluted	20,123,461	17,835,952	19,772,201	17,835,261
Basic and diluted net loss per common share outstanding	$ (0.49)	$ (0.41)	$ (0.92)	$ (0.89)

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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