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Purchase Consideration And Purchase Price Allocation (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Purchase Price Allocation [Line Items]  
Fair value of assumed equity allocated to purchase consideration $ 10,985,867us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Total purchase consideration 10,985,867us-gaap_BusinessCombinationConsiderationTransferred1
Goodwill 8,858,504us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
Intangible asset contract rights 1,342,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Other assets acquired 816,045us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
Liabilities assumed (30,682)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Total purchase allocation $ 10,985,867invt_BusinessAcquisitionPurchasePriceAllocationTotal