Income Taxes	6 Months Ended
Sep. 30, 2013
Income Taxes	Note 8. Income Taxes Deferred income taxes are recognized for the tax consequences in future years of differences between the tax bases of assets and liabilities and their financial reporting amounts at each fiscal year end based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount that is more likely than not to be realized. The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity. Evidence the Company considered included net operating losses incurred from the Company’s inception to March 31, 2011, expiration of various federal and state tax attributes, the uncertainty relative to the Department of Justice investigation of the Company and the Company’s planned PMA application for its Impella products, profits before tax for fiscal 2012 and 2013, year to date net loss and forecasted results for fiscal 2014. Based on its review of all available evidence, the Company determined that the objectively verifiable negative evidence outweighed the positive evidence and continues to record a valuation allowance to reduce its deferred tax assets to the amount that is more likely than not to be realizable as of September 30, 2013 and March 31, 2013. As of September 30, 2013, the Company has accumulated a net deferred tax liability of $6.0 million which is the result of the difference in accounting for the Company’s goodwill, which is amortizable over 15 years for tax purposes but not amortizable for book purposes. The net deferred tax liability cannot be offset against the Company’s deferred tax assets since it relates to an indefinite-lived asset and is not anticipated to reverse in the same period. The Company and its subsidiaries are subject to U.S. federal income tax, as well as income tax of multiple state and foreign jurisdictions. The Company has accumulated significant losses since its inception in 1981. All tax years remain subject to examination by major tax jurisdictions, including the federal government and the Commonwealth of Massachusetts. However, because the Company has net operating loss and tax credit carryforwards which may be utilized in future years to offset taxable income, those years may also be subject to review by relevant taxing authorities if the carryforwards are utilized.

Note 8. Income Taxes

Deferred income taxes are recognized for the tax consequences in future years of differences between the tax bases of assets and liabilities and their financial reporting amounts at each fiscal year end based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount that is more likely than not to be realized.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity. Evidence the Company considered included net operating losses incurred from the Company’s inception to March 31, 2011, expiration of various federal and state tax attributes, the uncertainty relative to the Department of Justice investigation of the Company and the Company’s planned PMA application for its Impella products, profits before tax for fiscal 2012 and 2013, year to date net loss and forecasted results for fiscal 2014. Based on its review of all available evidence, the Company determined that the objectively verifiable negative evidence outweighed the positive evidence and continues to record a valuation allowance to reduce its deferred tax assets to the amount that is more likely than not to be realizable as of September 30, 2013 and March 31, 2013.

As of September 30, 2013, the Company has accumulated a net deferred tax liability of $6.0 million which is the result of the difference in accounting for the Company’s goodwill, which is amortizable over 15 years for tax purposes but not amortizable for book purposes. The net deferred tax liability cannot be offset against the Company’s deferred tax assets since it relates to an indefinite-lived asset and is not anticipated to reverse in the same period.

The Company and its subsidiaries are subject to U.S. federal income tax, as well as income tax of multiple state and foreign jurisdictions. The Company has accumulated significant losses since its inception in 1981. All tax years remain subject to examination by major tax jurisdictions, including the federal government and the Commonwealth of Massachusetts. However, because the Company has net operating loss and tax credit carryforwards which may be utilized in future years to offset taxable income, those years may also be subject to review by relevant taxing authorities if the carryforwards are utilized.