EARNINGS PER SHARE (Details) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2010	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Reverse stock split conversion ratio	0.10
Net income attributable to Heska Corporation | $		$ 3,347	$ 1,415	$ 7,055	$ 3,210
Weighted average outstanding shares used to compute basic earnings per share attributable to Heska Corporation		6,871	6,344	6,727	6,270
Assumed exercise of dilutive stock options and restricted stock units		583	795	572	771
Diluted weighted-average common shares outstanding		7,454	7,139	7,299	7,041
Basic earnings per share attributable to Heska Corporation, in dollars per share | $ / shares		$ 0.49	$ 0.22	$ 1.05	$ 0.51
Diluted earnings per share attributable to Heska Corporation, in dollars per share | $ / shares		$ 0.45	$ 0.20	$ 0.97	$ 0.46
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		100	32	135	32