CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Previously Reported	Traditional Common Stock	Traditional Common Stock Previously Reported	Additional Paid-in Capital	Additional Paid-in Capital Previously Reported	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Previously Reported	Accumulated Deficit	Accumulated Deficit Previously Reported
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	7,442								7,442
Issuance of common stock, net of shares withheld for employee taxes	711		$ 2		709
Issuance of common stock, net of shares withheld for employee taxes (in shares)			170
Stock-based compensation	1,386				1,386
Accretion of non-controlling interest	845				845
Distribution for Heska Imaging minority interest	(954)				(954)
Other comprehensive income	170						170
Ending balance at Jun. 30, 2017	96,575		$ 72		240,621		267		(144,385)
Ending balance (in shares) at Jun. 30, 2017			7,196
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standards	2,635								2,635
Beginning balance at Dec. 31, 2017	103,075	$ 100,440	$ 73	$ 73	243,598	$ 243,598	232	$ 232	(140,828)	$ (143,463)
Beginning balance (in shares) at Dec. 31, 2017			7,303	7,303
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,052								4,052
Issuance of common stock, net of shares withheld for employee taxes	458		$ 2		456
Issuance of common stock, net of shares withheld for employee taxes (in shares)			195
Stock-based compensation	2,368				2,368
Other comprehensive income	(31)						(31)
Ending balance at Jun. 30, 2018	$ 109,922		$ 75		$ 246,422		$ 201		$ (136,776)
Ending balance (in shares) at Jun. 30, 2018			7,498