Income Taxes	6 Months Ended
Nov. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	NOTE G – INCOME TAXES Our effective tax rate was 15% for the second fiscal quarter of 2014 compared with 37% for the prior year period. The current quarter reflects a seven month benefit from the R&D tax credit that expired on December 31, 2013 and a benefit from lower tax rates in foreign jurisdictions in which we operate, offset by non-deductible interest expense related to contingent payments. Additionally during the second fiscal quarter of 2014, our APIC pool, which has been historically reduced when share-based compensation cost previously recognized by us was greater than the deduction allowed for income tax purposes based on the price of our common stock on the date of exercise or vesting, was fully depleted. This depletion resulted in a discrete tax expense which caused our tax benefit related to the loss for the quarter to be reported as a net tax expense. The prior year quarter was affected by a reduction in the Domestic Production Activities Deduction caused by reduced taxable income, the tax impact of non-deductible costs related to the acquisition of Vortex and a tax benefit related to the use of fully reserved capital loss carryforwards made possible by the gain on sale of our PDT laser product line. Our effective tax rate was a 28% benefit for the first six months of fiscal 2014 compared with 37% expense for the prior year period. The current period reflects a seven month benefit from the R&D tax credit that expired on December 31, 2013 and a benefit from lower tax rates in foreign jurisdictions in which we operate, offset by non-deductible interest expense related to contingent payments. Additionally during the 2014 period, our APIC pool, which has been historically reduced when share-based compensation cost previously recognized by us was greater than the deduction allowed for income tax purposes based on the price of our common stock on the date of exercise or vesting, was fully depleted. The prior period is affected by a reduction in the Domestic Production Activities Deduction caused by reduced taxable income, the tax impact of non-deductible costs related to the acquisition of Vortex and a tax benefit related to the use of fully reserved capital loss carryforwards made possible by the gain on sale of our PDT laser product line. The prior year period reflects a benefit from the R&D tax credit which expired December 31, 2011 and was retroactively reinstated during fiscal year 2013.

NOTE G – INCOME TAXES

Our effective tax rate was 15% for the second fiscal quarter of 2014 compared with 37% for the prior year period. The current quarter reflects a seven month benefit from the R&D tax credit that expired on December 31, 2013 and a benefit from lower tax rates in foreign jurisdictions in which we operate, offset by non-deductible interest expense related to contingent payments. Additionally during the second fiscal quarter of 2014, our APIC pool, which has been historically reduced when share-based compensation cost previously recognized by us was greater than the deduction allowed for income tax purposes based on the price of our common stock on the date of exercise or vesting, was fully depleted. This depletion resulted in a discrete tax expense which caused our tax benefit related to the loss for the quarter to be reported as a net tax expense. The prior year quarter was affected by a reduction in the Domestic Production Activities Deduction caused by reduced taxable income, the tax impact of non-deductible costs related to the acquisition of Vortex and a tax benefit related to the use of fully reserved capital loss carryforwards made possible by the gain on sale of our PDT laser product line.

Our effective tax rate was a 28% benefit for the first six months of fiscal 2014 compared with 37% expense for the prior year period. The current period reflects a seven month benefit from the R&D tax credit that expired on December 31, 2013 and a benefit from lower tax rates in foreign jurisdictions in which we operate, offset by non-deductible interest expense related to contingent payments. Additionally during the 2014 period, our APIC pool, which has been historically reduced when share-based compensation cost previously recognized by us was greater than the deduction allowed for income tax purposes based on the price of our common stock on the date of exercise or vesting, was fully depleted. The prior period is affected by a reduction in the Domestic Production Activities Deduction caused by reduced taxable income, the tax impact of non-deductible costs related to the acquisition of Vortex and a tax benefit related to the use of fully reserved capital loss carryforwards made possible by the gain on sale of our PDT laser product line. The prior year period reflects a benefit from the R&D tax credit which expired December 31, 2011 and was retroactively reinstated during fiscal year 2013.