Acquisitions (Details) (USD $)	1 Months Ended					12 Months Ended
	Oct. 31, 2011	Jan. 01, 2012 Road Safety International, Inc. [Member]	Jan. 01, 2012 Infusion Dynamics, Inc. [Member]	Oct. 02, 2011 Infusion Dynamics, Inc. [Member]	Oct. 03, 2010 Infusion Dynamics, Inc. [Member]	Oct. 03, 2010 Lifecor, Inc. [Member]	Sep. 27, 2009 Lifecor, Inc. [Member]	Apr. 03, 2011 Lifecor, Inc. [Member]
Business Acquisition [Line Items]
Payments for purchase of building	$ 10,800,000
Total consideration (including liabilities assumed)		550,000
Annual earn-out payments in the form of cash		250,000	25,000	25,000	25,000			26,300,000
Percentage of qualifying revenues						100.00%	100.00%
Qualifying revenues for earn-out payments						$ 30,000,000	$ 30,000,000