Income taxes	3 Months Ended
Apr. 30, 2015
Income taxes [Abstract]
Income taxes [Text Block]	Income taxes. The determination of the consolidated provision for income taxes, deferred tax assets and liabilities and related valuation allowances requires management to make judgments and estimates. As a company with subsidiaries in foreign jurisdictions, the process of calculating income taxes involves estimating current tax obligations and exposures in each jurisdiction as well as making judgments regarding the future recoverability of deferred tax assets. Income earned in the United Arab Emirates ("U.A.E.") is not subject to local country income tax. Additionally, the relative proportion of taxable income earned domestically versus internationally can fluctuate significantly from period to period. Changes in the estimated level of annual pre-tax income, tax laws and the results of tax audits can affect the overall effective income tax rate, which impacts the level of income tax expense and net income. Judgments and estimates related to the Company's projections and assumptions are inherently uncertain; therefore, actual results could differ materially from projections. Changes in tax laws and rates may affect recorded deferred tax assets and liabilities and the Company's effective tax rate in the future. The Company periodically reviews the adequacy of its valuation allowance in all of the tax jurisdictions in which it operates and may make further adjustments based on management's outlook for continued profits in each jurisdiction. The Company's consolidated effective tax rate ("ETR") from continuing operations was a negative 0.6% and a positive 23.2% for the three months ended April 30, 2015 and 2014, respectively. The change in the ETR for the two periods relates to the mix of income earned in zero rate jurisdictions. The amount of unrecognized tax benefits, including interest and penalties, at April 30, 2015, recorded in other long-term liabilities was $0.1 million of which $0.1 million would impact the Company’s effective tax rate if recognized. The Company includes accrued interest and penalties related to uncertain tax positions in income tax expense, with $2 thousand included in expense for the current quarter. The amount of accrued interest and penalties at April 30, 2015, associated with unrecognized tax benefits was $40 thousand. As of April 30, 2015, open tax years in federal and some state jurisdictions date back to 2012. In addition, federal and state tax years January 31, 2002 through January 31, 2012 are subject to adjustment on audit, up to the amount of research tax credits generated in those years. The Company has net operating loss carryforwards expiring in various years beginning January 31, 2030. Additionally, the Company files income tax returns in Denmark, India and Saudi Arabia. As of April 30, 2015, open tax years in foreign jurisdictions vary from three to seven years from the date of filing the income tax returns. The Company has not provided Federal tax on remaining unremitted earnings of its Denmark and Middle East subsidiaries. The Company does not believe that it will be necessary to repatriate earnings from these subsidiaries. The Company intends and has the ability to reinvest these earnings for the foreseeable future outside the U.S. If these amounts were distributed to the U.S., in the form of dividends or otherwise, the Company could be subject to additional U.S. income taxes. Determination of the amount of unrecognized deferred income tax liabilities on these earnings is not practicable, because such liability, if any, is dependent on circumstances existing if and when remittance occurs.

Income taxes. The determination of the consolidated provision for income taxes, deferred tax assets and liabilities and related valuation allowances requires management to make judgments and estimates. As a company with subsidiaries in foreign jurisdictions, the process of calculating income taxes involves estimating current tax obligations and exposures in each jurisdiction as well as making judgments regarding the future recoverability of deferred tax assets. Income earned in the United Arab Emirates ("U.A.E.") is not subject to local country income tax. Additionally, the relative proportion of taxable income earned domestically versus internationally can fluctuate significantly from period to period. Changes in the estimated level of annual pre-tax income, tax laws and the results of tax audits can affect the overall effective income tax rate, which impacts the level of income tax expense and net income. Judgments and estimates related to the Company's projections and assumptions are inherently uncertain; therefore, actual results could differ materially from projections.

Changes in tax laws and rates may affect recorded deferred tax assets and liabilities and the Company's effective tax rate in the future. The Company periodically reviews the adequacy of its valuation allowance in all of the tax jurisdictions in which it operates and may make further adjustments based on management's outlook for continued profits in each jurisdiction.

The Company's consolidated effective tax rate ("ETR") from continuing operations was a negative 0.6% and a positive 23.2% for the three months ended April 30, 2015 and 2014, respectively. The change in the ETR for the two periods relates to the mix of income earned in zero rate jurisdictions.

The amount of unrecognized tax benefits, including interest and penalties, at April 30, 2015, recorded in other long-term liabilities was $0.1 million of which $0.1 million would impact the Company’s effective tax rate if recognized. The Company includes accrued interest and penalties related to uncertain tax positions in income tax expense, with $2 thousand included in expense for the current quarter. The amount of accrued interest and penalties at April 30, 2015, associated with unrecognized tax benefits was $40 thousand.

As of April 30, 2015, open tax years in federal and some state jurisdictions date back to 2012. In addition, federal and state tax years January 31, 2002 through January 31, 2012 are subject to adjustment on audit, up to the amount of research tax credits generated in those years. The Company has net operating loss carryforwards expiring in various years beginning January 31, 2030. Additionally, the Company files income tax returns in Denmark, India and Saudi Arabia. As of April 30, 2015, open tax years in foreign jurisdictions vary from three to seven years from the date of filing the income tax returns.

The Company has not provided Federal tax on remaining unremitted earnings of its Denmark and Middle East subsidiaries. The Company does not believe that it will be necessary to repatriate earnings from these subsidiaries. The Company intends and has the ability to reinvest these earnings for the foreseeable future outside the U.S. If these amounts were distributed to the U.S., in the form of dividends or otherwise, the Company could be subject to additional U.S. income taxes. Determination of the amount of unrecognized deferred income tax liabilities on these earnings is not practicable, because such liability, if any, is dependent on circumstances existing if and when remittance occurs.