SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Total revenue	$ 18,271	$ 17,447	$ 37,466	$ 36,952
Operating income	383	887	1,465	2,427
Interest expense	29	22	59	55
Total assets	63,186	61,823	63,186	61,823	61,894
Net assets	48,764	47,736	48,764	47,736
Capital expenditures	271	348	542	445
Depreciation and amortization	448	510	861	1,118
Core Companion Animal Health
Total revenue	15,701	14,023	32,301	30,464
Operating income	464	266	1,009	1,205
Interest expense	23	18	47	39
Total assets	52,041	51,947	52,041	51,947
Net assets	40,167	40,576	40,167	40,576
Capital expenditures	53	109	235	166
Depreciation and amortization	220	296	409	693
Other Vaccines, Pharmaceuticals and Products
Total revenue	2,570	3,424	5,165	6,488
Operating income	(81)	621	456	1,222
Interest expense	6	4	12	16
Total assets	11,145	9,876	11,145	9,876
Net assets	8,597	7,160	8,597	7,160
Capital expenditures	218	239	307	279
Depreciation and amortization	$ 228	$ 214	$ 452	$ 425