Income Taxes	6 Months Ended
Oct. 31, 2013
Income Taxes	7. Income Taxes The Company uses the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities will be recognized in the period that includes the enactment date. A valuation allowance is established against the deferred tax assets to reduce their carrying value to an amount that is more likely than not to be realized. The Company computes its interim provision for income taxes by applying the estimated annual effective tax rate to income from operations and adjusts the provision for discrete tax items occurring in the period. The Company’s effective tax rate for the three and six months ended October 31, 2013 was (2.8%) and (0.5%), respectively, compared to (2.4%) and (1.9%) for the three and six months ended October 31, 2012, respectively. The negative tax rates were primarily attributable to estimated foreign and state income tax expense compared to a consolidated pre-tax book loss. The six months ended October 31, 2013 includes a benefit of $0.4 million which was recorded as a discrete item related to a 2013 Texas state research and development credit, which was enacted in the first quarter of this fiscal year.

Income Taxes

6 Months Ended

Oct. 31, 2013

7. Income Taxes

The Company uses the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities will be recognized in the period that includes the enactment date. A valuation allowance is established against the deferred tax assets to reduce their carrying value to an amount that is more likely than not to be realized.

The Company computes its interim provision for income taxes by applying the estimated annual effective tax rate to income from operations and adjusts the provision for discrete tax items occurring in the period. The Company’s effective tax rate for the three and six months ended October 31, 2013 was (2.8%) and (0.5%), respectively, compared to (2.4%) and (1.9%) for the three and six months ended October 31, 2012, respectively. The negative tax rates were primarily attributable to estimated foreign and state income tax expense compared to a consolidated pre-tax book loss.

The six months ended October 31, 2013 includes a benefit of $0.4 million which was recorded as a discrete item related to a 2013 Texas state research and development credit, which was enacted in the first quarter of this fiscal year.