Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	RedPath Integrated Pathology, Inc [Member]
Beginning Balance at Dec. 31, 2012		$ 161	$ (13,792)	$ 128,508	$ (79,258)	$ 11
Beginning Balance, shares at Dec. 31, 2012		16,064,000	1,097,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued, shares		146,000
Common stock issued		1		0
SARs exercised, shares		1,000
SARs exercised		0
Restricted stock issued, shares		143,000
Restricted stock issued		(1)		(2)
Restricted stock forfeited, shares		(38,000)
Restricted stock forfeited		0
Treasury stock purchased, shares			49,000
Treasury stock purchased			(314)
Stock-based compensation expense				1,723
Net loss	(4,565)				(4,565)
Unrealized holding gain on available-for-sale securities, net of tax	5					5
Ending Balance at Dec. 31, 2013	32,479	163	(14,106)	130,229	(83,823)	16
Ending Balance, shares at Dec. 31, 2013		16,316,000	1,146,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued, shares		81,000
Common stock issued		0		0
Adjustments to Additional Paid in Capital, Other							1,820
SARs exercised, shares	0	0
Restricted stock issued, shares	402,648	174,000
Restricted stock issued	(721)	(2)		(2)
Restricted stock forfeited, shares	(71,032)	(13,000)
Restricted stock forfeited		0
Treasury stock purchased, shares			51,000
Treasury stock purchased			(228)
Stock-based compensation expense				2,124
Net loss	(16,073)				(16,073)
Unrealized holding gain on available-for-sale securities, net of tax	0					0
Ending Balance at Dec. 31, 2014	$ 20,122	$ 165	$ (14,334)	$ 134,171	$ (99,896)	$ 16
Ending Balance, shares at Dec. 31, 2014		16,558,000	1,197,000