Commitments (Lease Terms) (Details)	12 Months Ended
	Jan. 31, 2013
Manufacturing and Distribution Facility in Torrance, CA [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease period	5 years
Manufacturing Facility in Conway, AR [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease period	10 years
Machinery and equipment [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease period	5 years