CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Traditional Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2016	$ 86,975	$ 70	$ 238,635	$ 97	$ (151,827)
Beginning balance (in shares) at Dec. 31, 2016		7,026
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,303				4,303
Issuance of common stock, net of shares withheld for employee taxes	(147)	$ 1	(148)
Issuance of common stock, net of shares withheld for employee taxes (in shares)		68
Stock-based compensation	691		691
Accretion of non-controlling interest	845		845
Distribution for Heska Imaging minority interest	(25)		(25)
Other comprehensive income	56			56
Ending balance at Mar. 31, 2017	92,698	$ 71	239,998	153	(147,524)
Ending balance (in shares) at Mar. 31, 2017		7,094
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standards	2,634				2,634
Beginning balance (Previously Reported) at Dec. 31, 2017	100,440	$ 73	243,598	232	(143,463)
Beginning balance at Dec. 31, 2017	103,074	$ 73	243,598	232	(140,829)
Beginning balance (in shares) (Previously Reported) at Dec. 31, 2017		7,303
Beginning balance (in shares) at Dec. 31, 2017		7,303
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,155				2,155
Issuance of common stock, net of shares withheld for employee taxes	(1,284)	$ 1	(1,285)
Issuance of common stock, net of shares withheld for employee taxes (in shares)		116
Stock-based compensation	1,064		1,064
Other comprehensive income	81			81
Ending balance at Mar. 31, 2018	$ 105,090	$ 74	$ 243,377	$ 313	$ (138,674)
Ending balance (in shares) at Mar. 31, 2018		7,419