<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.4.0.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>207</ContextCount>
  <ElementCount>244</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>57</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>101 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>102 - Statement - Consolidated Statements of Financial Condition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ConsolidatedStatementsOfFinancialCondition</Role>
      <ShortName>Consolidated Statements of Financial Condition</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>103 - Statement - Consolidated Statements of Financial Condition (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ConsolidatedStatementsOfFinancialConditionParenthetical</Role>
      <ShortName>Consolidated Statements of Financial Condition (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>104 - Statement - Consolidated Statements of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>105 - Statement - Consolidated Statement of Changes in Equity and Non-controlling Interests</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ConsolidatedStatementOfChangesInEquityAndNoncontrollingInterests</Role>
      <ShortName>Consolidated Statement of Changes in Equity and Non-controlling Interests</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>106 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>107 - Disclosure - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/Organization</Role>
      <ShortName>Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>108 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>109 - Disclosure - Investments in Affiliates</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/InvestmentsInAffiliates</Role>
      <ShortName>Investments in Affiliates</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>110 - Disclosure - Fair Value of Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestments</Role>
      <ShortName>Fair Value of Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>111 - Disclosure - Variable Interest Entities ("VIEs")</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/VariableInterestEntitiesVies</Role>
      <ShortName>Variable Interest Entities ("VIEs")</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>112 - Disclosure - Management Fee Income and Incentive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncome</Role>
      <ShortName>Management Fee Income and Incentive Income</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>113 - Disclosure - Debt Obligations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/DebtObligations</Role>
      <ShortName>Debt Obligations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>114 - Disclosure - Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/Compensation</Role>
      <ShortName>Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>115 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>116 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>117 - Disclosure - Fixed Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FixedAssets</Role>
      <ShortName>Fixed Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>118 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>119 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>120 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>121 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>122 - Disclosure - Supplemental Financial Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformation</Role>
      <ShortName>Supplemental Financial Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>123 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>124 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>125 - Disclosure - Fair Value of Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsTables</Role>
      <ShortName>Fair Value of Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestments</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>126 - Disclosure - Variable Interest Entities ("VIEs") (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/VariableInterestEntitiesViesTables</Role>
      <ShortName>Variable Interest Entities ("VIEs") (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/VariableInterestEntitiesVies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>127 - Disclosure - Management Fee Income and Incentive Income (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncomeTables</Role>
      <ShortName>Management Fee Income and Incentive Income (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncome</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>128 - Disclosure - Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CompensationTables</Role>
      <ShortName>Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/Compensation</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>129 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxes</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>130 - Disclosure - Fixed Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FixedAssetsTables</Role>
      <ShortName>Fixed Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FixedAssets</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>131 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>132 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShare</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>133 - Disclosure - Supplemental Financial Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformationTables</Role>
      <ShortName>Supplemental Financial Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>134 - Disclosure - Organization (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/OrganizationDetailsTextual</Role>
      <ShortName>Organization (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/Organization</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>135 - Disclosure - Investments in Affiliates (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/InvestmentsInAffiliatesDetailsTextual</Role>
      <ShortName>Investments in Affiliates (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/InvestmentsInAffiliates</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>136 - Disclosure - Fair Value of Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsDetails</Role>
      <ShortName>Fair Value of Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>137 - Disclosure - Fair Value of Investments (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsDetails1</Role>
      <ShortName>Fair Value of Investments (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>138 - Disclosure - Fair Value of Investments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsDetailsTextual</Role>
      <ShortName>Fair Value of Investments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FairValueOfInvestmentsTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>139 - Disclosure - Variable Interest Entities ("VIEs") (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/VariableInterestEntitiesViesDetails</Role>
      <ShortName>Variable Interest Entities ("VIEs") (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/VariableInterestEntitiesViesTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>140 - Disclosure - Management Fee Income and Incentive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncomeDetails</Role>
      <ShortName>Management Fee Income and Incentive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncomeTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>141 - Disclosure - Management Fee Income and Incentive Income (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncomeDetailsTextual</Role>
      <ShortName>Management Fee Income and Incentive Income (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/ManagementFeeIncomeAndIncentiveIncomeTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>142 - Disclosure - Debt Obligations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/DebtObligationsDetailsTextual</Role>
      <ShortName>Debt Obligations (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/DebtObligations</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>143 - Disclosure - Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CompensationDetails</Role>
      <ShortName>Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CompensationTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>144 - Disclosure - Compensation (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CompensationDetails1</Role>
      <ShortName>Compensation (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CompensationTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>145 - Disclosure - Compensation (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CompensationDetails2</Role>
      <ShortName>Compensation (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CompensationTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>146 - Disclosure - Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CompensationDetailsTextual</Role>
      <ShortName>Compensation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CompensationTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>147 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>148 - Disclosure - Income Taxes (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesDetails1</Role>
      <ShortName>Income Taxes (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>149 - Disclosure - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesDetailsTextual</Role>
      <ShortName>Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/IncomeTaxesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>150 - Disclosure - Related Party Transactions (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/RelatedPartyTransactionsDetailsTextual</Role>
      <ShortName>Related Party Transactions (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/RelatedPartyTransactions</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>151 - Disclosure - Fixed Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FixedAssetsDetails</Role>
      <ShortName>Fixed Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FixedAssetsTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>152 - Disclosure - Fixed Assets (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/FixedAssetsDetailsTextual</Role>
      <ShortName>Fixed Assets (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/FixedAssetsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>153 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>154 - Disclosure - Commitments and Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingenciesDetailsTextual</Role>
      <ShortName>Commitments and Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>155 - Disclosure - Stockholders' Equity (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/StockholdersEquityDetailsTextual</Role>
      <ShortName>Stockholders' Equity (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/StockholdersEquity</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>156 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShareTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>157 - Disclosure - Earnings Per Share (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShareDetailsTextual</Role>
      <ShortName>Earnings Per Share (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/EarningsPerShareTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>158 - Disclosure - Supplemental Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformationDetails</Role>
      <ShortName>Supplemental Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformationTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>159 - Disclosure - Supplemental Financial Information (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformationDetails1</Role>
      <ShortName>Supplemental Financial Information (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/SupplementalFinancialInformationTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="zais-20160331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>160 - Disclosure - Subsequent Events (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.h2ffinancialmanagementinc.com/role/SubsequentEventsDetailsTextual</Role>
      <ShortName>Subsequent Events (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.h2ffinancialmanagementinc.com/role/SubsequentEvents</ParentRole>
      <Position>60</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>zais-20160331.xml</File>
    <File>zais-20160331.xsd</File>
    <File>zais-20160331_cal.xml</File>
    <File>zais-20160331_def.xml</File>
    <File>zais-20160331_lab.xml</File>
    <File>zais-20160331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
