Note

— Net Loss Per Share

The following table (in thousands, except for loss per share) reconciles basic and diluted weighted average common shares outstanding for each of the

three

and

nine

months ended

September 30, 2019

and

2018

	Three months ended						Nine months ended
	September 30,						September 30,
	2019			2018			2019			2018
Weighted average common shares outstanding:
Basic		107,181			106,639			107,062			106,476
Dilutive unvested stock, Convertible Preferred Stock, Common Stock Warrants and IPO Warrants		—			—			—			—
Diluted		107,181			106,639			107,062			106,476

Basic and diluted net loss per share attributable to common stockholders	$	(0.06	)	$	(0.10	)	$	(0.29	)	$	(0.29	)

Potentially dilutive securities

not

included in the diluted net loss per share computations because their effect would have been anti-dilutive were as follows (in thousands):

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
Unvested stock (1)		989		513		768		483
Convertible Preferred Stock		14,678		3,322		12,829		1,119
Common Stock Warrants		1,801		425		1,576		143
IPO Warrants (2)		12,082		12,082		12,082		12,082
Total potentially dilutive common shares		29,550		16,342		27,255		13,827

(

)

Does

not

include

3.2

million shares for each of the

three

and

nine

months ended

September 30, 2019

and

16.3

million shares for the

three

and

nine

months ended

September 30, 2018

, of unvested stock because the performance conditions had

not

yet been satisfied as of

September 30, 2019

and

2018

, respectively.

(

)

2015,

the Company issued warrants in connection with its initial public offering (the “IPO Warrants”). The IPO Warrants are exercisable at a price of

$11.50

per share and expire on

July 24, 2022.

The Company

may

redeem the IPO Warrants at a price of

$0.01

per IPO Warrant upon

days’ notice only if the last sale price of Company common stock is at least

$17.50

per share for any

trading days within a

-trading day period. If the Company redeems the IPO Warrants in this manner, the Company will have the option to do so on a cashless basis with the issuance of an economically equivalent number of shares of Company common stock.