EARNINGS PER SHARE (Details) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended
	Dec. 31, 2010	Mar. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Reverse stock split conversion ratio	0.10
Net income attributable to Heska | $		$ 2,155	$ 4,607
Weighted average outstanding shares used to compute basic earnings per share attributable to Heska Corporation (in shares)		7,102	7,011
Assumed exercise of dilutive stock options and restricted shares		609	583
Diluted weighted-average common shares outstanding		7,711	7,594
Basic earnings per share attributable to Heska Corporation (in dollars per share) | $ / shares		$ 0.30	$ 0.66
Diluted earnings per share attributable to Heska Corporation (in dollars per share) | $ / shares		$ 0.28	$ 0.61
Stock Options And Restricted Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted units excluded from computation of earnings per share		244	110