New Accounting Pronouncements (Policies)	6 Months Ended
New Accounting Pronouncements (Policies)	Sep. 30, 2018
New Accounting Pronouncements [Abstract]
New Accounting Pronouncements Recently Adopted	New Accounting Pronouncements Recently Adopted Revenue Recognition Effective April 1, 2018, the Company adopted ASC 606 using the full retrospective transition method. Under this method, the Company adjusted its revised consolidated financial statements (see Note 2) for the years ended March 31, 2017 and 2018, and applicable interim periods within the fiscal year ended March 31, 2018, as if ASC 606 had been effective for those periods. Periods prior to the fiscal year ended March 31, 2017 were not adjusted and continue to be reported in accordance with the Company’s historic accounting under Topic 605, Revenue Recognition. ASC 606 applies to all contracts with customers, except for contracts that are within the scope of other standards. Under ASC 606, an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the Company performs the following five steps: (i) identifies the contract(s) with a customer; (ii) identifies the performance obligations in the contract; (iii) determines the transaction price; (iv) allocates the transaction price to the performance obligations in the contract; and (v) recognizes revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the Company will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract and determines those that are distinct performance obligations. See Note 4 for additional discussion of the adoption of ASC 606 and the impact on the Company’s financial statements. Financial Instruments In January 2016, the FASB issued guidance that amends the classification and measurement of financial instruments. Changes to the current guidance primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the update clarifies guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. This guidance was effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company applied the amendments in the new guidance by means of a cumulative-effect adjustment of $746,000, net of tax, to the opening balance of retained earnings on April 1, 2018. Short-term investments are recorded at fair value with $111,000 and $180,000 of unrealized gain now recorded as a component of general and administrative expense for the three and six months ended September 30, 2018, respectively. Modifications to Share-Based Payment Awards In May 2017, the FASB issued guidance to provide clarity and reduce (i) the diversity in practice and (ii) the cost and complexity when applying the accounting guidance for equity-based compensation to a change to the terms or conditions of a share-based payment award. This update provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. This guidance was effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017 with early adoption permitted. This guidance should be applied prospectively to an award modified on or after that adoption date. The adoption of this guidance on April 1, 2018 did not have any impact on the Company’s consolidated financial statements. Business Combinations In January 2017, the FASB issued guidance which clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new guidance was effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. A reporting entity should apply the amendment prospectively. The adoption of this guidance on April 1, 2018 did not have any impact on the Company’s consolidated financial statements.
New Accounting Pronouncements Not Yet Adopted	New Accounting Pronouncements Not Yet Adopted Leases In February 2016, the FASB issued new guidance that requires balance sheet recognition of a right-of-use asset and lease liability by lessees for operating leases. There have been further amendments, including practical expedients, issued in January 2018 and July 2018. The new guidance also requires new disclosures providing additional qualitative and quantitative information about the amounts recorded in the financial statements. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The new guidance requires a modified retrospective approach with optional practical expedients. The Company will adopt this guidance in the first quarter of fiscal 2020. The Company has developed and is executing on an implementation plan to adopt this new guidance. The Company has identified all of its material leases and is assessing those leases pursuant to ASC 842. The Company is currently developing its methodology for determining its incremental borrowing rate. The adoption is anticipated to have a significant increase to the Company’s long-term assets and liabilities on the consolidated balance sheets, as the Company will now be required to recognize the underlying right of use asset and corresponding lease liability, and an insignificant impact on the consolidated statements of operations. Goodwill Impairment In January 2017, the FASB issued guidance which simplifies the test for goodwill impairment. This standard eliminates Step 2 from the goodwill impairment test, instead requiring an entity to recognize a goodwill impairment charge for the amount by which the goodwill carrying amount exceeds the reporting unit’s fair value. This guidance is effective for interim and annual goodwill impairment tests in fiscal years beginning after December 15, 2019 with early adoption permitted. This guidance must be applied on a prospective basis. The Company is currently evaluating the impact the provisions of this guidance will have on its consolidated financial statements. Derivatives and Hedging In August 2017, the FASB issued guidance to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. The amendments in this update also make certain targeted improvements to simplify the application of the hedge accounting guidance in current GAAP. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years; the guidance allows for early adoption in any interim period after issuance of the update. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements. Reporting Comprehensive Income In February 2018, the FASB issued guidance that permits, but does not require, companies to reclassify the stranded tax effects of the Tax Reform Act on items within accumulated other comprehensive income to retained earnings. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements. Fair Value Measurements In August 2018, the FASB issued guidance, which changes the disclosure requirements for fair value measurements by removing, adding and modifying certain disclosures. The standard is effective for financial statements issued for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements.