Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Testing revenue	$ 7,044	$ 6,710	$ 14,139	$ 12,544
Collaboration and license revenue	85	66	205	156
Total revenue	7,129	6,776	14,344	12,700
Operating expenses:
Cost of testing	2,508	2,403	5,218	4,565
Research and development	2,510	792	3,931	1,512
Sales and marketing	2,526	1,610	4,549	3,084
General and administrative	2,329	2,316	5,034	4,111
Change in estimated fair value of contingent consideration	142	0	(111)	0
Total operating expenses	10,015	7,121	18,621	13,272
Loss from operations	(2,886)	(345)	(4,277)	(572)
Interest expense, net	(256)	(644)	(1,083)	(1,192)
Other (expense) income, net	(43)	366	(97)	(163)
Loss before income taxes	(3,185)	(623)	(5,457)	(1,927)
Income tax benefit	0	1,500	0	1,500
Net (loss) income	$ (3,185)	$ 877	$ (5,457)	$ (427)
Net (loss) income per share (Note 3):
Basic	$ (0.27)	$ 0.87	$ (0.46)	$ (0.42)
Diluted	$ (0.27)	$ 0.13	$ (0.46)	$ (0.42)
Shares used to compute net (loss) income per share:
Basic	11,835,405	1,013,128	11,824,993	1,012,769
Diluted	11,835,405	6,939,568	11,824,993	1,012,769