SUPPLEMENTAL QUARTERLY FINANCIAL INFORMATION (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 39,542	$ 33,430	$ 29,965	$ 27,146	$ 29,759	$ 28,034	$ 23,910	$ 22,894	$ 130,083	$ 104,597	$ 89,837
Gross profit	16,050	13,718	12,682	11,442	12,235	11,597	10,297	10,084	53,892	44,213	35,715
Operating income	6,515	4,492	3,556	1,970	3,565	2,142	1,829	1,021	16,533	8,557	2,911
Net income	4,633	3,343	2,742	1,447	2,375	1,383	1,178	583	12,165	5,519
Net income attributable to Heska Corporation	$ 3,453	$ 3,347	$ 2,522	$ 1,186	$ 2,029	$ 1,415	$ 1,197	$ 598	$ 10,508	$ 5,239	$ 2,603
Basic earnings (loss) per share attributable to Heska Corporation, in dollars per share	$ 0.50	$ 0.49	$ 0.38	$ 0.18	$ 0.29	$ 0.22	$ 0.19	$ 0.10	$ 1.55	$ 0.80	$ 0.44
Diluted earnings per share attributable to Heska Corporation	$ 0.46	$ 0.45	$ 0.35	$ 0.17	$ 0.28	$ 0.20	$ 0.17	$ 0.09	$ 1.43	$ 0.74