SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	$ 32,765	$ 29,559
Operating income	1,871	2,788
Income before income taxes	1,875	2,850
Capital expenditures	375	480
Depreciation and amortization	1,196	1,092
Assets	137,720		$ 135,787
Net Assets	105,090		100,440
Operating Segments | Core Companion Animal Health
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	26,819	23,784
Operating income	1,923	1,146
Income before income taxes	1,927	1,214
Capital expenditures	57	49
Depreciation and amortization	908	845
Assets	117,418		111,968
Net Assets	80,686		75,984
Operating Segments | Other Vaccines, Pharmaceuticals and Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	5,946	5,775
Operating income	(52)	1,642
Income before income taxes	(52)	1,636
Capital expenditures	318	431
Depreciation and amortization	288	$ 247
Assets	20,302		23,819
Net Assets	$ 24,404		$ 24,456