XML 49 R31.htm IDEA: XBRL DOCUMENT v3.20.4
STOCKHOLDERS' (DEFICIT) EQUITY (Tables)
 12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Summary of Common Stock In addition, the Company had reserved for issuance the following amounts of shares of its common stock for the purposes described below as of December 31, 2020 and 2019 (in thousands):
December 31,
20202019
Shares of common stock issued140,450106,801
Shares of common stock reserved for issuance for:
Warrants
2,247 22,895 
Stock options
10,147 6,236 
Shares available for grant under 2014 Stock Incentive Plan
4,863 8,753 
Shares available for sale under 2014 Employee Stock Purchase Plan
— 28 
Total shares of common stock issued and reserved for issuance
157,707 144,713 
Summary of Warrants Outstanding and Warrant Activity The following table sets forth the Company's warrant activity for the year ended December 31, 2020 (in thousands):
IssuedExercise
Price		ExpirationDecember 31, 2019Issued(Exercised)(Cancelled)December 31, 2020
Jun-2019$1.47Jun-202020,410 — — (20,410)— 
Mar-2018
$0.55*
Mar-20231,943 — (238)— 1,705 
Nov-2017
$0.55*
Nov-2022487 — — — 487 
May-2015$11.83Nov-202428 — — — 28 
Nov-2014$11.04Nov-202427 — — — 27 
22,895 — (238)(20,410)2,247 
* Exercise price shown (i) reflects modification described below and (ii) subject to further adjustment based on down round provision added by amendment described below.