EARNINGS PER SHARE (Details) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2010	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Reverse stock split conversion ratio	0.10
Net income attributable to Heska Corporation | $		$ 3,333	$ 2,522	$ 7,940	$ 3,707
Weighted average outstanding shares used to compute basic earnings per share attributable to Heska Corporation		7,069	6,695	6,967	6,641
Assumed exercise of dilutive stock options and restricted stock units		563	554	603	565
Diluted weighted-average common shares outstanding		7,632	7,249	7,570	7,206
Basic earnings per share attributable to Heska Corporation, in dollars per share | $ / shares		$ 0.47	$ 0.38	$ 1.14	$ 0.56
Diluted earnings per share attributable to Heska Corporation, in dollars per share | $ / shares		$ 0.44	$ 0.35	$ 1.05	$ 0.51
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		25	138	132	138