Income Taxes (Details Textual) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Income Taxes (Additional Textual) [Abstract]
Income before income taxes related to foreign operations	$ 8,400,000	$ 12,700,000	$ 9,300,000
Tax-free cumulative unremitted foreign earnings permanently invested outside country of domicile	46,500,000	39,500,000	32,800,000
Increase decrease in valuation allowance	1,000,000	500,000	200,000
Valuation allowance	1,800,000	800,000
Total federal, state and foreign unrecognized tax benefits	3,500,000	4,600,000
Unrecognized tax benefits reducing entity's effective tax rate, if recognized	2,400,000	3,600,000
Unrecognized tax benefits, interest	800,000	1,000,000
Reduction in unrecognized tax benefits	500,000
U.S Tax provided on earning on investment outside US	0
State [Member]
Income Taxes (Textual) [Abstract]
US Federal net operating loss carryforwards	3,900,000
Operating loss carry forwards, expiration year	2015
Tax credit carry forwards	1,800,000
US Federal [Member]
Income Taxes (Textual) [Abstract]
US Federal net operating loss carryforwards	10,500,000
Operating loss carry forwards, expiration year	2020
Tax credit carry forwards	$ 0