Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Jan. 31, 2016	Jan. 31, 2015
Income Taxes [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 22,800			$ 21,600
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	3,200
Deferred Tax Assets, Valuation Allowance, Noncurrent	2,200		$ 2,200
Provision (Benefit) For Income Taxes	(24)	$ 892
Brazil [Member]
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	2,900
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount	9,500
Federal State And Foreign Income Taxes [Member]
Income Taxes [Line Items]
Provision (Benefit) For Income Taxes	$ 100	$ 800
Weifang Meiyang Protective Products Co., Ltd [Member]
Income Taxes [Line Items]
Estimated Dividends, Amount				$ 1,000
Estimated Dividends, Percentage				33.00%
Percentage Of Net Income				50.00%