Disabled Button when it Clicked in table

Question

Hello, I want to disable button Assign when it clicked, beacause it should assign only once so i can achieve this, I have done following code for HTML. Thanks in advance

   

    <table class="table details">

    <thead>

    <tr>

    <th sort-by="firstName">User Name</th>

    <th sort-by="lastName">Description</th>

    <th sort-by="Budget" sort-init="desc">Bid Amount</th>

    <th sort-by="lastName">Action</th>

    </tr>

    </thead>

    <tbody>

    <tr ng-repeat="issue in issues | filter:filter">

    <td><strong><a href="/ViewBid/Index?{{ issue.User_ID }}" />{{ issue.UserName }}           </strong></td>

    <td><a href="/ViewBid/Index?{{ issue.User_ID }}" />{{ issue.Description }}</td>

    <td><a href="/ViewBid/Index?{{ issue.User_ID }}" />{{issue.Bid_amt}}</td>

    <td>

    <div ng-controller="ExampleCtrl_Assign">

    <div ng-show="AsgHide">

    <button type="button" ng-click="AssignRecord(issue.ID,issue.Description,issue.Bid_amt)">Assign</button>

    </div>

    </div>

     <div ng-controller="ExampleCtrl_Delete">

    <div ng-show="AsgHide" >

    <button type="button" ng-click="DeleteRecord(issue.ID)">Delete</button>

    </div>

    </div>

    </td>

    </tr>

    </tbody>

    </table>