Subsequent Events - Additional Information (Detail) - $ / shares			6 Months Ended
	Aug. 10, 2020	Jul. 28, 2020	Jun. 30, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Common stock shares outstanding			775,403	695,902
Share based compensation by share based payment arrangement options equity instruments other than options in period			14,945
Series D Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Shares issued during the period,shares			273,070
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock shares outstanding	26,719,993
Reverse stock split		common stock and convertible preferred stock on a 9.724-for-one basis
Subsequent Event [Member] | Two Thousand And Twenty Plan [Member]
Subsequent Event [Line Items]
Shares of common stock were reserved for issuance	2,193,360
Subsequent Event [Member] | Common Stock [Member] | Two Thousand And Twenty Plan [Member]
Subsequent Event [Line Items]
Share based compensation by share based payment arrangement options grants in period	850,217
Shares of common stock were authorized	387,063
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Two Thousand And Twenty Plan [Member]
Subsequent Event [Line Items]
Share based compensation by share based payment arrangement options equity instruments other than options in period	211,251
Subsequent Event [Member] | Restricted Stock Awards [Member] | Two Thousand And Twenty Plan [Member]
Subsequent Event [Line Items]
Share based compensation by share based payment arrangement options equity instruments other than options in period	17,976
Subsequent Event [Member] | Series A Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Coversion of shares as result of conversion of temporary equity into permanent equity	391,210
Subsequent Event [Member] | Series B Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Coversion of shares as result of conversion of temporary equity into permanent equity	3,088,444
Subsequent Event [Member] | Series C Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Coversion of shares as result of conversion of temporary equity into permanent equity	4,499,921
Subsequent Event [Member] | Series D Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Coversion of shares as result of conversion of temporary equity into permanent equity	8,593,360
Class of warrants number of securities called by the warrants or rights	446,990
Excercise price of each warrant	$ 16.67
Subsequent Event [Member] | Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Reverse stock split		9.724-for-one basis
Subsequent Event [Member] | IPO [Member]
Subsequent Event [Line Items]
Shares issued during the period,shares	10,147,058
Subsequent Event [Member] | Over-Allotment Option [Member]
Subsequent Event [Line Items]
Shares issued during the period,shares	1,323,529
Subsequent Event [Member] | IPO And Over Allotment [Member]
Subsequent Event [Line Items]
Stock issue share price per unit	$ 18.00