SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	$ 29,965	$ 23,910	$ 57,111	$ 46,804
Operating Income	3,556	1,829	5,526	2,850
Income before income taxes	3,522	1,792	5,625	2,676
Capital expenditures	463	331	1,368	936
Depreciation and amortization	1,115	1,068	2,211	2,074
Assets	119,625		119,625		$ 109,719
Net Assets	75,658		75,658		63,528
United States
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	28,908	22,926	54,729	44,339
Assets	116,552		116,552		106,780
Europe
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	567	515	1,120	1,046
Assets	3,073		3,073		2,939
Other International
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	490	469	1,262	1,419
Operating Segments | Core Companion Animal Health
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	24,464	20,757	47,898	40,329
Operating Income	2,746	1,536	4,504	2,071
Income before income taxes	2,724	1,511	4,532	1,921
Capital expenditures	82	142	479	449
Depreciation and amortization	915	894	1,812	1,724
Assets	95,829		95,829		92,567
Net Assets	59,303		59,303		48,175
Operating Segments | Other Vaccines, Pharmaceuticals and Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total revenue	5,501	3,153	9,213	6,475
Operating Income	810	293	1,022	779
Income before income taxes	798	281	1,093	755
Capital expenditures	381	189	889	487
Depreciation and amortization	200	$ 174	399	$ 350
Assets	23,796		23,796		17,152
Net Assets	$ 16,355		$ 16,355		$ 15,353