Stockholders Equity - Additional Information (Details)			1 Months Ended	3 Months Ended				9 Months Ended
	Jun. 16, 2020 USD ($) shares	Mar. 19, 2020 $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares	Dec. 31, 2019 $ / shares shares	Oct. 04, 2019 shares
Class Of Stock [Line Items]
Common stock voting rights								one vote
Beneficial conversion feature | $			$ 3,564,000		$ (3,564,000)	$ 3,564,000
Net proceeds from private placement | $			20,300,000					$ 20,300,000
Common stock, par value | $ / shares				$ 0.0001				$ 0.0001		$ 0.0001
Deemed dividend | $	$ 3,564,000				$ 3,564,000
Common stock reserved for issuance | shares				15,782,813				15,782,813		8,011,334
Expected dividend | $								$ 0
Total intrinsic value of options exercised | $				$ 23,000			$ 1,500,000	$ 43,000	$ 1,531,000
Weighted-average grant date fair value of options granted | $ / shares				$ 3.11			$ 5.45	$ 4.20	$ 5.50
2010 Share Option Plan
Class Of Stock [Line Items]
Stock option, vesting period								7 years
Stock option, vesting period extension								10 years
Common stock reserved for issuance | shares				133,517				133,517		44,450
2019 Incentive Award Plan
Class Of Stock [Line Items]
Common stock reserved for issuance | shares				99,032				99,032		698,378	450,000
Percentage of common shares outstanding								4.00%
2020 Private Placement Warrants
Class Of Stock [Line Items]
Net proceeds from private placement | $			4,621,000
Common Stock
Class Of Stock [Line Items]
Net proceeds from private placement | $			$ 4,052,000
Preferred stock convertible into common stock | shares	6,600,000
Common Stock | 2020 Private Placement Warrants
Class Of Stock [Line Items]
Common stock, par value | $ / shares			$ 0.0001			$ 0.0001
Series A Convertible Preferred Stock
Class Of Stock [Line Items]
Conversion cap percentage			19.99%			19.99%
Initial conversion ratio			0.1
Preferred stock, dividends paid on outstanding shares | $			$ 0
Share issued price per share | $ / shares			$ 2.47			$ 2.47
Preferred stock effective conversion price per share | $ / shares			$ 1.93			1.93
Series A Preferred Shares
Class Of Stock [Line Items]
Net proceeds from private placement | $			$ 8,063,000
Preferred stock convertible into common stock | shares	660,000
Series A Preferred Shares | 2020 Private Placement Warrants
Class Of Stock [Line Items]
Preferred stock, par value | $ / shares			$ 0.0001			0.0001
Investors | 2020 Private Placement Warrants
Class Of Stock [Line Items]
Exercise price of warrants | $ / shares			$ 3.50			$ 3.50
Warrants expiry period			5 years
Warrants exercisable period								beginning 181 days after their issue date
Investors | 2020 Private Placement Warrants | Maximum
Class Of Stock [Line Items]
Warrants to purchase shares of common stock | shares			6,675,000			6,675,000
Securities Purchase Agreement | Investors
Class Of Stock [Line Items]
Warrants expiry period		5 years
Warrants exercisable period								beginning 181 days after their issue date
Common stock, par value | $ / shares		$ 0.0001
Securities Purchase Agreement | Investors | Series A Convertible Preferred Stock
Class Of Stock [Line Items]
Preferred stock, shares issued | shares	660,000	660,000	660,000			660,000
Preferred stock, par value | $ / shares		$ 0.0001
Securities Purchase Agreement | Investors | Series A Convertible Preferred Stock | Common Stock
Class Of Stock [Line Items]
Preferred stock convertible into common stock | shares	6,600,000	6,600,000