Income Taxes	9 Months Ended
Income Taxes	Oct. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and nine months ended October 31, 2020, the Company recorded a tax provision of $0.2 million and tax benefit of $0.6 million on a pretax loss of $72.6 million and $191.2 million, respectively. The effective tax rate for the three and nine months ended October 31, 2020 was (0.3)% and 0.3%, respectively. The effective tax rate differs from the statutory rate primarily as a result of not recognizing deferred tax assets for U.S. losses due to a full valuation allowance against U.S. deferred tax assets and excess tax benefits from stock-based compensation in the United Kingdom. The tax benefit recognized for the nine months ended October 31, 2020 was partially offset by income tax expense in profitable foreign jurisdictions and U.S. state taxes. For the three and nine months ended October 31, 2019, the Company recorded a tax provision of $0.3 million and tax benefit of $2.3 million on pretax losses of $63.1 million and $160.7 million, respectively. The effective tax rate for the three and nine months ended October 31, 2019 was (0.6)% and 1.4%, respectively. The effective tax rate differs from the statutory rate primarily as a result of not recognizing deferred tax assets for U.S. losses due to a full valuation allowance against U.S. deferred tax assets, release of the valuation allowance in the United States in connection with the Azuqua acquisition and excess tax benefits from stock-based compensation in the United Kingdom. The tax benefit recognized for the nine months ended October 31, 2019 was partially offset by income tax expense in profitable foreign jurisdictions and U.S. state taxes. On March 27, 2020, the President signed into law the Coronavirus Aid, Relief, and Economic Security Act (the CARES Act). The CARES Act provides numerous tax provisions and other stimulus measures, including temporary changes regarding the prior and future use of net operating losses, temporary changes to the prior and future limitations on interest deductions, temporary suspension of certain payment requirements for the employer portion of Social Security taxes, technical corrections from prior tax legislation for tax depreciation of certain qualified improvement property, and the creation of certain refundable employee retention credits. The Company does not expect there to be a material tax impact on its condensed consolidated financial statements at this time, and will continue to assess the implications of the CARES Act and its continuing developments and interpretations.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.