Represents the amount of contingent note during the period.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

Number of warrants or rights outstanding.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Face (par) amount of debt instrument at time of issuance.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Business Combination - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended
	Jun. 06, 2014	Mar. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Stockholders' equity note, stock split, conversion ratio		1.4139
Common Stock, Shares, Issued	20,018,028us-gaap_CommonStockSharesIssued	31,130,681us-gaap_CommonStockSharesIssued	27,997,128us-gaap_CommonStockSharesIssued
Common Stock, Shares, Outstanding	20,018,028us-gaap_CommonStockSharesOutstanding	31,130,681us-gaap_CommonStockSharesOutstanding	27,997,128us-gaap_CommonStockSharesOutstanding
Class of Warrant or Right, Outstanding	700,937
Initial Amount Of Contingent Note	$ 11,000,000invt_InitialAmountOfContingentNote
Debt Instrument, Face Amount	300,000us-gaap_DebtInstrumentFaceAmount
Business Acquisition, Goodwill, Expected Tax Deductible Amount		8,858,504
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		1,342,000
Finite-Lived Intangible Asset, Useful Life		5 years
Business Combination, Acquisition Related Costs		1,237,641
Asset Impairment Charges		$ 686,350us-gaap_AssetImpairmentCharges	$ 686,350us-gaap_AssetImpairmentCharges
Series A Preferred Stock [Member]
Business Acquisition [Line Items]
Preferred Stock, Shares Issued	6,176,748
Preferred Stock, Shares Outstanding	6,176,748
Preferred Class B [Member]
Business Acquisition [Line Items]
Preferred Stock, Shares Issued	2,231
Preferred Stock, Shares Outstanding	2,231
Placement Agents [Member]
Business Acquisition [Line Items]
Class of Warrant or Right, Outstanding	238,412