Consolidated Statements of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total USD ($)	Common Stock	Additional Paid-In Capital USD ($)	Accumulated Other Comprehensive Loss USD ($)	Accumulated Deficit USD ($)
Balances at Dec. 28, 2008	$ 146.9		$ 503.5		$ (356.6)
Balance (in shares) at Dec. 28, 2008		12.8
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for employee stock purchase plan, options and warrants	0.4		0.4
Issuance of common stock for employee stock purchase plan, options and warrants (in shares)		0.1
Issuance of common stock for acquisitions	0.1		0.1
Stock options issued for acquisitions	17.5		17.5
Stock options issued for acquisitions (in shares)		2.6
Paid in capital and common stock issued for contingent consideration	(0.2)		(0.2)
Paid in capital and common stock issued for contingent consideration (in shares)		0.3
Stock-based compensation	1.7		1.7
Net income (loss)	(41.5)				(41.5)
Balance at Dec. 27, 2009	124.9		523.0		(398.1)
Balance (in shares) at Dec. 27, 2009		15.8
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for employee stock purchase plan, options and warrants	1.7		1.7
Issuance of common stock for employee stock purchase plan, options and warrants (in shares)		0.3
Issuance of common stock for cash	24.7		24.7
Issuance of common stock for cash (in shares)		2.5
Fair value of options assumed for acquisitions	1.7		1.7
Stock-based compensation	1.9		1.9
Conversion of convertible notes	0.5		0.5
Net income (loss)	14.5				14.5
Balance at Dec. 26, 2010	169.9		553.5		(383.6)
Balance (in shares) at Dec. 26, 2010		18.6
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for employee stock purchase plan, options and warrants	2.0		2.0
Issuance of common stock for employee stock purchase plan, options and warrants (in shares)		0.4
Issuance of common stock for cash	61.1		61.1
Issuance of common stock for cash (in shares)		4.9
Issuance of common stock for acquisitions	109.7		109.7
Issuance of common stock for acquisitions (in shares)		10.4
Fair value of options assumed for acquisitions	1.9		1.9
Stock-based compensation	3.3		3.3
Redemption of Series B Convertible Preferred Stock (in shares)		0.1
Common stock repurchased	(10.9)		(10.9)
Common stock repurchased (in shares)		(2.0)
Net income (loss)	(24.2)				(24.2)
Other comprehensive loss, net of tax	(0.2)			(0.2)
Balance at Dec. 25, 2011	$ 312.6		$ 720.6	$ (0.2)	$ (407.8)
Balance (in shares) at Dec. 25, 2011		32.4