v2.4.1.9

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Common stock, par value	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, authorized	24,000,000us-gaap_CommonStockSharesAuthorized	24,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued	380,247us-gaap_CommonStockSharesIssued	163,580us-gaap_CommonStockSharesIssued
Common stock, outstanding	380,247us-gaap_CommonStockSharesOutstanding	163,580us-gaap_CommonStockSharesOutstanding
Series A-1 Preferred stock [Member]
Preferred stock, par value	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember
Preferred stock, authorized	400,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember	400,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember
Preferred stock, issued	222,620us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember	222,620us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember
Preferred stock, outstanding	222,620us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember	222,620us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesAOnePreferredStockMember
Series A-2 Preferred stock [Member]
Preferred stock, par value	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember
Preferred stock, authorized	300,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember	300,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember
Preferred stock, issued	171,612us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember	171,612us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember
Preferred stock, outstanding	171,612us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember	171,612us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesATwoPreferredStockMember
Series B-1 Preferred stock [Member]
Preferred stock, par value	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember
Preferred stock, authorized	4,650,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember	4,650,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember
Preferred stock, issued	683,650us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember	0us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember
Preferred stock, outstanding	683,650us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember	0us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesBOnePreferredStockMember
Series B-2 Preferred stock [Member]
Preferred stock, par value	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember
Preferred stock, authorized	12,650,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember	12,650,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember
Preferred stock, issued	1,508,001us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember	0us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember
Preferred stock, outstanding	1,508,001us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember	0us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = naov_SeriesBTwoPreferredStockMember
Series C Preferred stock [Member]
Preferred stock, par value	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
Preferred stock, authorized	5,500,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember	5,500,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
Preferred stock, issued	833,333us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember	0us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
Preferred stock, outstanding	833,333us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember	0us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember

X

- Definition

Face amount or stated value per share of common stock.

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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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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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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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