Stockholders' Equity - Summary of Reconciliation of Warrants to Purchase Share of the Company's Common Stock (Detail) - $ / shares	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Stockholders Equity Note [Abstract]
Number of Warrants, Outstanding and exercisable, Beginning balance	48,683	48,683	48,683
Number of Warrants, Outstanding and exercisable, Ending balance	48,683	48,683	48,683
Weighted Average Exercise Price, Outstanding and exercisable, Beginning balance	$ 12.33	$ 12.33	$ 12.33
Weighted Average Exercise Price, Outstanding and exercisable, Ending balance	$ 12.33	$ 12.33	$ 12.33