Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Preferred stock and convertible preferred stock

Preferred stock and convertible preferred stock consist of the following:

	December 31,
	2020		2019
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2020 and 2019; no shares issued and outstanding at December 31, 2020 and 2019	$	—	$	—
Series B convertible preferred stock, $0.001 par value, 147,000 shares designated at December 31, 2020 and 2019, and 200 shares issued and outstanding at December 31, 2020 and 2019, respectively	1		1
Series D convertible preferred stock, $0.001 par value, 21,300 shares designated at December 31, 2020 and 2019, and no shares issued and outstanding at December 31, 2020 and 2019, respectively	—		—
Series F convertible preferred stock, $0.001 par value, 10,621 shares designated at December 31, 2020 and 2019, and no shares issued and outstanding at December 31, 2020 and 2019, respectively	—		—

Reserved Authorized Shares of Common Stock for Future Issuance

At December 31, 2020, the Company has reserved authorized shares of common stock for future issuance as follows:

Outstanding stock options	361,956
Possible future issuance under inducement plan	1,250
Possible future issuance under stock option plans	53,356
Possible future issuance under employee stock purchase plan	—
Total	416,562