
17.	Earnings (Loss) Attributable to Tennant Company Per Share

The computations of Basic and Diluted Earnings (Loss) per Share were as follows:



	Three Months Ended				Nine Months Ended
	September 30				September 30
	2018		2017		2018		2017
Numerator:
Net Earnings (Loss) Attributable to Tennant Company	$	9,676	$	3,559	$	25,694	$	(2,989	)
Denominator:
Basic - Weighted Average Shares Outstanding	17,998,917		17,729,857		17,911,880		17,673,656
Effect of dilutive securities:
Share-based compensation plans	440,704		441,587		432,933		—
Diluted - Weighted Average Shares Outstanding	18,439,621		18,171,444		18,344,813		17,673,656
Basic Earnings (Loss) per Share	$	0.54	$	0.20	$	1.43	$	(0.17	)
Diluted Earnings (Loss) per Share	$	0.52	$	0.20	$	1.40	$	(0.17	)

Excluded from the dilutive securities shown above were options to purchase and shares to be paid out under share-based compensation plans of 139,106 and 340,239 shares of common stock during the three months ended September 30, 2018 and 2017, respectively. Excluded from the dilutive securities shown above were options to purchase and shares to be paid out under share-based compensation plans of 214,605 and 714,687 shares of common stock during the nine months ended September 30, 2018 and 2017, respectively. These exclusions were made if the exercise prices of the options are greater than the average market price of our common stock for the period, if the number of shares we can repurchase under the treasury stock method exceeds the weighted average shares outstanding in the options or if we have a net loss, as these effects are anti-dilutive.