Common Stock

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Common Stock

13. COMMON STOCK

Common Stock

The Company’s amended and restated certificate of incorporation as of March 31, 2020 authorized the issuance of 200.0 million shares of common stock, $0.01 par value per share, of which 18.726 million were issued and outstanding as of March 31, 2020.

The following table summarizes the total number of shares of the Company’s common stock issued and reserved for issuance as of March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020		December 31, 2019
Shares of common stock issued		18,726		18,645
Shares of common stock reserved for issuance for:
Common stock warrants outstanding		105		105
Stock options outstanding		2,324		2,415
Restricted stock units outstanding		1,522		245
Shares available for grant under stock incentive plan		694		1,215
Shares available for sale under employee stock purchase plan		608		421
Total shares of common stock issued and    reserved for issuance		23,979		23,046

Common Stock Warrants

The following table summarizes the Company’s outstanding common stock warrants as of March 31, 2020 and December 31, 2019:

Warrants Outstanding (in thousands)		Exercise Price		Expiration Date
	14	$	19.55	Dec-2022
	30	$	9.73	Feb-2021
	20	$	9.73	Aug-2023
	20	$	9.73	Mar-2024
	21	$	9.73	Dec-2024
	105