EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per share

The following is a reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted earnings per share ("EPS") for the years ended December 31, 2020, 2019 and 2018 (in thousands, except per share data):

	Years ended December 31,
	2020		2019		2018
Net (loss) income attributable to Heska Corporation	$	(14,399)	$	(1,465)	$	5,850
Basic weighted-average common shares outstanding	8,653		7,446		7,220
Assumed exercise of dilutive stock options and restricted shares	—		—		636
Diluted weighted-average common shares outstanding	8,653		7,446		7,856
Basic (loss) earnings per share attributable to Heska Corporation	$	(1.66)	$	(0.20)	$	0.81
Diluted (loss) earnings per share attributable to Heska Corporation	$	(1.66)	$	(0.20)	$	0.74

Schedule of antidilutive securities excluded from computation of earnings per share

The following potentially outstanding common shares from convertible preferred stock, convertible senior notes, stock options and restricted stock awards were excluded from the computation of diluted EPS because the effect would have been antidilutive (in thousands):

	Years ended December 31,
	2020	2019	2018
Convertible preferred stock	458	—	—
Convertible senior notes	118	—	—
Stock options and restricted shares	328	300	111
	904	300	111