Fair Value Measurements	9 Months Ended
Fair Value Measurements	Dec. 31, 2015
Fair Value Measurements
Fair Value Measurements	4.Fair Value Measurements We measure fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Fair value measurements are based on a three-tier hierarchy that prioritizes the inputs used to measure fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets and liabilities; Level 2, defined as observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities or prices quoted in inactive markets; and Level 3, defined as unobservable inputs that are significant to the fair value of the asset or liability, and for which little or no market data exists, therefore requiring management to utilize its own assumptions to provide its best estimate of what market participants would use in valuing the asset or liability. The liability for the estimated fair value of the contingent consideration in connection with our acquisitions of Meridian Environmental Technology, Inc. (“MET”) in January 2011 and Berkeley Transportation Systems, Inc. (“BTS”) in November 2011 was initially determined using Level 3 inputs based on a probability weighted calculation whereby we assigned estimated probabilities to achieving the earn-out targets and then discounted the total contingent consideration to net present value. The MET and BTS earn-out targets were completed during the fiscal year ended March 31, 2013 and the deferred acquisition payments were completed during Fiscal 2015. There was no remaining contingent consideration liability at December 31, 2015 or March 31, 2015. We did not have any material financial assets or liabilities measured at fair value on a recurring basis using Level 3 inputs as of December 31, 2015 or March 31, 2015. Our non-financial assets, such as goodwill, intangible assets and property and equipment, are measured at fair value on a non-recurring basis, generally when there is a transaction involving those assets such as a purchase transaction, a business combination or an adjustment for impairment. No non-financial assets were measured at fair value during the nine months ended December 31, 2015 and 2014.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.