Income Taxes	9 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The benefit of income taxes in the three months ended December 31, 2019 was $1,403 and the provision for income taxes in the three months ended December 31, 2018 was $456. The effective tax rate benefit was 46.6% for the three months ended December 31, 2019 and the effective tax rate was 8.6% for the three months ended December 31, 2018. The decrease in the effective tax rate for the three months ended December 31, 2019 compared to the prior year period was primarily due to the increased net benefit of the research and development credits, partially offset by nondeductible stock option related expenses, nondeductible officer’s compensation, and reserves for uncertain tax position. Additionally, due to the difference in the amount of income before taxes, the impact of the rate reconciliation items on the effective tax rate was more significant in the three months ended December 31, 2019. The benefit of income taxes in the nine months ended December 31, 2019 was $1,274 and the provision for income taxes in the nine months ended December 31, 2018 was $2,794. The effective tax rate benefit was 12.2% for the nine months ended December 31, 2019 and the effective tax rate was 12.0% for the nine months ended December 31, 2018. The decrease in the effective tax rate for the nine months ended December 31, 2019 compared to the prior year period was primarily due to the increased net benefit of the research and development credits and other one-time discrete benefits, partially offset by nondeductible stock option related expenses. Additionally, due to the difference in the amount of income before taxes, the impact of the rate reconciliation items on the effective tax rate was more significant in the nine months ended December 31, 2019. The deferred tax assets and liabilities are presented net in the accompanying condensed consolidated balance sheets as noncurrent. We expect to receive the full benefit of the deferred tax assets recorded, with the exception of certain state credits, and state net operating loss carryforwards, for which we have recorded a valuation allowance. Uncertain tax positions We had unrecognized tax benefits of $3,564 and $2,894 related to various federal, state and local income tax matters as of December 31, 2019 and March 31, 2019, respectively. The unrecognized benefits consisted of liabilities of $1,658 and $1,680 and reserves against deferred tax assets of $1,906 and $1,218 as of December 31, 2019 and March 31, 2019, respectively. If recognized, this amount would reduce our effective tax rate. We are no longer subject to United States federal income tax examinations for tax years before fiscal year ended 2015. With a few exceptions, we are no longer subject to state or local income tax examinations for tax years before fiscal year ended 2014. We do not anticipate the total unrecognized tax benefits to significantly change due to the settlement of audits or the expiration of statute of limitations within the next twelve months.

Income Taxes

9 Months Ended

Dec. 31, 2019

11. Income Taxes

The benefit of income taxes in the three months ended December 31, 2019 was $1,403 and the provision for income taxes in the three months ended December 31, 2018 was $456. The effective tax rate benefit was 46.6% for the three months ended December 31, 2019 and the effective tax rate was 8.6% for the three months ended December 31, 2018. The decrease in the effective tax rate for the three months ended December 31, 2019 compared to the prior year period was primarily due to the increased net benefit of the research and development credits, partially offset by nondeductible stock option related expenses, nondeductible officer’s compensation, and reserves for uncertain tax position. Additionally, due to the difference in the amount of income before taxes, the impact of the rate reconciliation items on the effective tax rate was more significant in the three months ended December 31, 2019.

The benefit of income taxes in the nine months ended December 31, 2019 was $1,274 and the provision for income taxes in the nine months ended December 31, 2018 was $2,794. The effective tax rate benefit was 12.2% for the nine months ended December 31, 2019 and the effective tax rate was 12.0% for the nine months ended December 31, 2018. The decrease in the effective tax rate for the nine months ended December 31, 2019 compared to the prior year period was primarily due to the increased net benefit of the research and development credits and other one-time discrete benefits, partially offset by nondeductible stock option related expenses. Additionally, due to the difference in the amount of income before taxes, the impact of the rate reconciliation items on the effective tax rate was more significant in the nine months ended December 31, 2019.

The deferred tax assets and liabilities are presented net in the accompanying condensed consolidated balance sheets as noncurrent. We expect to receive the full benefit of the deferred tax assets recorded, with the exception of certain state credits, and state net operating loss carryforwards, for which we have recorded a valuation allowance.

Uncertain tax positions

We had unrecognized tax benefits of $3,564 and $2,894 related to various federal, state and local income tax matters as of December 31, 2019 and March 31, 2019, respectively. The unrecognized benefits consisted of liabilities of $1,658 and $1,680 and reserves against deferred tax assets of $1,906 and $1,218 as of December 31, 2019 and March 31, 2019, respectively. If recognized, this amount would reduce our effective tax rate.

We are no longer subject to United States federal income tax examinations for tax years before fiscal year ended 2015. With a few exceptions, we are no longer subject to state or local income tax examinations for tax years before fiscal year ended 2014. We do not anticipate the total unrecognized tax benefits to significantly change due to the settlement of audits or the expiration of statute of limitations within the next twelve months.