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Subsequent Events - Additional Information (Detail) (2015 Stock Incentive Plan [Member], Common Stock [Member], Subsequent Event [Member])
0 Months Ended
Apr. 30, 2015
Apr. 01, 2015
2015 Stock Incentive Plan [Member] | Common Stock [Member] | Subsequent Event [Member]
   
Subsequent Event [Line Items]    
Common stock approved for the issuance   2,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= idi_TwoThousandFifteenStockIncentivePlanMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Common stock granted 1,380,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= idi_TwoThousandFifteenStockIncentivePlanMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember