5. Acquisitions iSheriff, Inc. On November 21, 2016, the Company entered into an Asset Purchase Agreement (APA) to purchase substantially all of the assets of iSheriff, Inc. (iSheriff), a cloud-based security provider. This acquisition is expected to provide Mimecasts customers additional real-time email threat intelligence and detection expertise and complements the Companys existing portfolio of email security, continuity and archiving solutions. The purchase price of $6.2 million consisted of a cash payment of approximately $5.6 million, subject to certain adjustments, and $0.6 million in purchase price held back in respect of claims for indemnification for one year from the purchase date. The Company made the $0.6 million payment in the Companys third quarter 2018, net of amounts respective to certain unresolved claims. In addition, the APA included contingent consideration related to a discretionary purchase price in the amount of $2.0 million, which was payable at the sole and absolute discretion of the Company on the one-year anniversary of the purchase date. In November 2017, on the one-year anniversary of the purchase, the Company determined that payment of this contingent consideration was not warranted. The acquisition of iSheriff has been accounted for as a business combination and, in accordance with ASC 805, Business Combinations , the Company has recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. The following table summarizes the estimated fair value of assets acquired and liabilities assumed: Fair value of assets acquired and liabilities assumed: Prepaid expenses $ 65 Accounts receivable 218 Intangible assets 1,654 Goodwill 5,142 Total assets acquired 7,079 Deferred revenue (796 ) Accrued liabilities (78 ) Total fair value of assets acquired and liabilities assumed $ 6,205 In the year ended March 31, 2017, acquisition-related expenses of $0.7 million were expensed as incurred and included in general and administrative expenses in th