Net Loss Per Share

Because of the net losses in the three months ended March 31, 2019 and 2018, the following outstanding Company securities, using the treasury stock method, were excluded from the calculations of net loss per share because the effect would have been anti-dilutive:



	Three Months Ended March 31,
	2019	2018
Common stock options	—	2,699
Restricted stock awards	2,690	1,181
Restricted stock units	6,578	3,074
Total	9,268	6,954

For purposes of calculating the maximum dilutive impact, it is presumed that the convertible senior notes and Deerfield Warrants (as defined and described in further detail in Note 6) will be settled in common stock with the resulting potential common shares included in diluted earnings per share if the effect is more dilutive. The effect of the conversion of the convertible senior notes and Deerfield Warrants is excluded from the calculation of diluted loss per share because the impact of these securities would be anti-dilutive.

The potential dilutive effect of these securities is shown in the table below:



	Three Months Ended March 31,
	2019	2018
Convertible senior notes	755,695	1,193,938
2017 Deerfield Warrants	647,001	647,001
2018 Deerfield Warrants	875,001	—

The effect of the contingently issuable common stock (see Note 9) is excluded from the calculation of basic net loss per share until all necessary conditions for issuance have been satisfied.