15. Net Loss per Share

The Company computes net loss per share in accordance with ASC 260‑10, Earnings per Share (see Note 2, Significant Accounting Policies – Income (Loss) per Share).

The denominators used in the net loss per share computations are as follows:


	Year Ended December 31,
	2019	2018	2017
Basic:
Weighted average common shares outstanding	42,669,333	35,892,786	31,202,842
Diluted:
Weighted average common shares outstanding - Basic	42,669,333	35,892,786	31,202,842
Common stock options*	—	—	—
Denominator for diluted net loss per share	42,669,333	35,892,786	31,202,842

*No amounts were considered as their effects would be anti-dilutive.

Basic and diluted net loss per share are computed as follows:


	Year Ended December 31,
	2019		2018		2017
Net loss	$	(106,373)	$	(74,013)	$	(58,125)
Weighted-average common shares outstanding:
Basic and Diluted		42,669,333		35,892,786		31,202,842
Net loss per share, Basic and Diluted	$	(2.49)	$	(2.06)	$	(1.86)

As of December 31, 2019, 2018 and 2017, 4,450,517, 4,004,422 and 3,492,141 stock options, respectively, were outstanding, which could potentially dilute basic earnings per share in the future, but were not included in the computation of diluted net loss per share because to do so would have been anti-dilutive. In addition, 104,168 unvested restricted stock units issued to executive officers that were outstanding at December 31, 2019 were also not included in the computation of diluted net loss per share because to do so would have been anti-dilutive. The 36,666 and 74,166 restricted stock units that vested and were settled in shares of common stock in December 2019 and May 2019, respectively, were included in the computation of basic and diluted net loss per share for the year ended December 31, 2019. The 24,000 restricted stock units granted in June 2019 to the non-employee members of the Board of Directors were also not included in the computation of diluted net loss per share because to do so would have been anti-dilutive (see Note 13, Stock-Based Compensation).