EARNINGS PER SHARE (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 14, 2020 shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Reverse stock split conversion ratio		10
Net loss attributable to Heska Corporation | $		$ (19,889)	$ (1,148)	$ (14,399)
Basic weighted-average common shares outstanding (In shares)		10,343,000	10,015,000	8,653,000
Assumed exercise of dilutive stock options and restricted stock awards (in shares)		0	0	0
Diluted weighted-average common shares outstanding (in shares)		10,343,000	10,015,000	8,653,000
Basic earnings per share attributable to Heska Corporation (in dollars per share) | $ / shares		$ (1.92)	$ (0.11)	$ (1.66)
Diluted earnings per share attributable to Heska Corporation (in dollars per share) | $ / shares		$ (1.92)	$ (0.11)	$ (1.66)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted units excluded from computation of earnings per share		1,274,000	1,400,000	904,000
Series X Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion to common stock (in shares)	122,000
Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion to common stock (in shares)	1,508,964
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted units excluded from computation of earnings per share		0	0	458,000
Senior Convertible Note
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted units excluded from computation of earnings per share		996,000	996,000	118,000
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		278,000	404,000	328,000