Loss Per Share - Schedule of Antidilutive Shares Exercise or Vesting Excluded from Computation of Earnings (Loss) Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	16,318,821	3,939,172	945,195
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	137,256	140,323	12,613
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	333	2,000	3,166
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	16,181,232	3,796,849	929,416