Debt and Lines of Credit (Details Textual)	3 Months Ended				3 Months Ended								3 Months Ended
	Apr. 30, 2013 USD ($) Subsidiary	Apr. 30, 2013 CHF	Apr. 30, 2012 USD ($)	Apr. 30, 2012 CHF	Apr. 30, 2013 Maximum USD ($)	Apr. 30, 2013 Minimum USD ($)	Apr. 30, 2013 Revolving Credit Facility USD ($)	Mar. 12, 2012 Revolving Credit Facility USD ($)	Apr. 30, 2013 LIBOR	Apr. 30, 2013 Base Rate Loans	Apr. 30, 2013 Line of Credit USD ($)	Apr. 30, 2012 Line of Credit USD ($)	Apr. 30, 2013 Loan Agreement USD ($)	Mar. 12, 2012 Loan Agreement USD ($)	Apr. 30, 2013 First Amendment	Apr. 30, 2013 Second Amendment
Debt and Lines of Credit (Textual) [Abstract]
Asset based senior revolving credit facility	$ 25,000,000							$ 25,000,000
Letter of credit sub facility														15,000,000
Maximum credit facility							50,000,000
Fixed charge coverage ratio maximum							0.0125						0.0125
Fixed charge coverage ratio minimum							0.0100						0.0100
Lenders' commitment under the Loan Agreement					55,000,000	25,000,000
Applicable margin for LIBOR rate loans									4.25%						1.25%	0.75%
Decreased or increased in applicable margin rates					12,500,000	5,000,000
Applicable margins based on current availability for LIBOR rate loans at the end									2.00%	1.00%
Availability under loan agreement					10,000,000	10,000,000							12,500,000
Share repurchases made by the Borrowers					150,000,000
Acquisition made by the borrowers					50,000,000
Borrowings against these lines	0										0	0
Debt and Lines of Credit (Additional Texual) [Abstract]
Credit facility maturity date	Mar. 12, 2015
Amount blocked for specific purpose	10,000,000
Domestic EBITDA	10,000,000
Current borrowing base	25,000,000							25,000,000
Maximum reduction in availability block	5,000,000
Letters of credit outstanding under sub facility	20,600,000
Total availability under facility	0
Outstanding borrowing amount in letters of credit facility	0										0	0
Application margin for base rate loan	3.25%
Decreased or increased in applicable margin	0.25%
Time limit for imposing cash dominion	90 days
Time limit for imposing fixed charge	45 days
Time period for imposing minimum fixed charge coverage ratio	90 days
Aggregate amount of charitable donations permitted by the Company	14,000,000
Cash assets with the borrowers	60,000,000
Positive EBITDA	0
Specified borrowing capacity	12,500,000
Lines of credit totaled at the end	10,800,000	10,000,000	11,000,000	10,000,000
Number of subsidiary	2
Guaranteed obligations to third parties	$ 2,300,000