Common Stock - Summary of Stock Options Activity (Detail)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Optioned Common Shares, Beginning Balance | shares	50,498
Number of Optioned Common Shares, Granted | shares	178,380
Number of Optioned Common Shares, Expired | shares	(30)
Number of Optioned Common Shares, Forfeited | shares	(1,406)
Number of Optioned Common Shares, Ending Balance | shares	227,442
Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 190.46
Weighted Average Exercise Price, Granted | $ / shares	10.66
Weighted Average Exercise Price, Expired | $ / shares	34,874.40
Weighted Average Exercise Price, Forfeited | $ / shares	227.61
Weighted Average Exercise Price, Ending Balance | $ / shares	$ 44.64