SEGMENT INFORMATION (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting [Abstract]
Number of segments (in number of segments)	2		2
Intersegment sales	$ 2,900,000	$ 3,300,000	$ 5,600,000	$ 5,700,000
Segment Reporting Information [Line Items]
Revenues from external customers	54,287,000	48,273,000	107,487,000	97,000,000
Depreciation and amortization	3,949,000	3,533,000	7,753,000	7,055,000
Operating profit (loss)	5,041,000	6,486,000	3,489,000	12,094,000
Technology and Strategic Partnerships [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	31,148,000	29,565,000	63,017,000	59,774,000
Depreciation and amortization	1,932,000	1,675,000	3,739,000	3,295,000
Operating profit (loss)	6,394,000	7,290,000	14,075,000	14,520,000
Assays and Related Products [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	23,139,000	18,708,000	44,470,000	37,226,000
Depreciation and amortization	2,017,000	1,858,000	4,014,000	3,760,000
Operating profit (loss)	$ (1,353,000)	$ (804,000)	$ (10,586,000)	$ (2,426,000)