NET INCOME PER SHARE

Net income per common share is presented for both basic income per share (“Basic EPS”) and diluted income per share (“Diluted EPS”). Basic EPS is based on the weighted-average number of common shares outstanding during the period. Diluted EPS is based on the weighted-average number of common shares and common share equivalents outstanding during the period.

The potential common shares that were considered anti-dilutive securities were excluded from the diluted earnings per share calculations for the relevant periods either because the sum of the exercise price per share and the unrecognized compensation cost per share was greater than the average market price of our common stock for the relevant period, or because they were considered contingently issuable. The contingently issuable potential common shares result from certain stock options and restricted stock units granted to our employees that vest based on performance conditions, market conditions, or a combination of performance and market conditions.

The following table sets forth (in thousands) potential common shares that were considered anti-dilutive securities at September 30, 2018 and 2017.



	September 30, 2018	September 30, 2017
Options	916	2,334
Non-vested restricted stock units	3,009	3,289
Anti-dilutive potential common shares	3,925	5,623

On June 15, 2015, we issued $125.0 million aggregate principal amount of our 2.00% Convertible Senior Notes due 2020, or the Notes. The Notes are convertible into cash, shares of our common stock or a combination of cash and shares of common stock, at our election, based on an initial conversion rate, subject to adjustment. In connection with the offering of the Notes, we entered into a capped call transaction, or Capped Call, with a third party. We use the treasury stock method in computing the dilutive impact of the Notes. The Notes are convertible into shares of our common stock but our stock price was less than the conversion price as of September 30, 2018 and 2017, and, therefore, the Notes are excluded from Diluted EPS. The Capped Call is not reflected in diluted net income per share as it will always be anti-dilutive.