CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Adoption of accounting standards	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Adoption of accounting standards	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Adoption of accounting standards	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2020				0	0	9,476	9,476
Beginning balance at Dec. 31, 2020	$ 287,053	$ (26,469)	$ 260,584	$ 0	$ 0	$ 95	$ 95	$ 423,650	$ (29,834)	$ 393,816	$ 14,169	$ 14,169	$ (150,861)	$ 3,365	$ (147,496)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Heska Corporation	1,871												1,871
Issuance of common stock, net of shares withheld for employee taxes (in shares)						1
Issuance of common stock, net of forfeitures and shares withheld for employee taxes	178					$ 0		178
Equity offering, net of issuance costs (in shares)						941
Equity offering, net of issuance costs	164,186					$ 9		164,177
Stock-based compensation	3,837							3,837
Other comprehensive income (loss)	(5,383)										(5,383)
Ending balance (in shares) at Mar. 31, 2021				0		10,418
Ending balance at Mar. 31, 2021	425,273			$ 0		$ 104		562,008			8,786		(145,625)
Beginning balance (in shares) at Dec. 31, 2021				0		10,712
Beginning balance at Dec. 31, 2021	435,854			$ 0		$ 107		579,354			5,037		(148,644)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Heska Corporation	(9,986)												(9,986)
Issuance of common stock, net of shares withheld for employee taxes (in shares)						74
Issuance of common stock, net of forfeitures and shares withheld for employee taxes	(3,200)					$ 1		(3,201)
Stock-based compensation	5,110							5,110
Equity contingent consideration	3,860							3,860
Other comprehensive income (loss)	(3,043)										(3,043)
Ending balance (in shares) at Mar. 31, 2022				0		10,786
Ending balance at Mar. 31, 2022	$ 428,595			$ 0		$ 108		$ 585,123			$ 1,994		$ (158,630)