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Note 1 - Basic and Diluted Income Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | |
|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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| Basic EPS: | ||
| Net income available to common stockholders | $ 20,360us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 4,074us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
| Less: undistributed earnings to participating securities | (127)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | (31)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic |
| Net income allocated to common stockholders | 20,360us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 4,074us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
| Net income allocated to common stockholders (in shares) | 12,131us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 11,154us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
| Net income allocated to common stockholders (in dollars per share) | $ 1.67us-gaap_EarningsPerShareBasic | $ 0.36us-gaap_EarningsPerShareBasic |
| Effect of dilutive securities: | ||
| Warrants to purchase common stock (in shares) | 421us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants | |
| Plus: reallocation of undistributed earnings to participating securities | 5nhtc_PlusreallocationOfUndistributedEarningsToParticipatingSecurities | |
| Diluted EPS: | ||
| Net income allocated to common stockholders plus assumed conversions | 20,238us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | 4,043us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted |
| Net income allocated to common stockholders plus assumed conversions (in shares) | 12,600us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 11,331us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
| Net income allocated to common stockholders plus assumed conversions (in dollars per share) | $ 1.61us-gaap_EarningsPerShareDiluted | $ 0.36us-gaap_EarningsPerShareDiluted |
| Distributed [Member] | ||
| Basic EPS: | ||
| Net income available to common stockholders |
20,233us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
4,043us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
| Net income allocated to common stockholders |
$ 20,233us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
$ 4,043us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
| Net income allocated to common stockholders (in shares) |
12,131us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
11,154us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
| Net income allocated to common stockholders (in dollars per share) |
$ 1.67us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
$ 0.36us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = nhtc_DistributedMember |
| Restricted Stock [Member] | ||
| Effect of dilutive securities: | ||
| Non-vested restricted stock (in shares) |
48us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
177us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
| X | ||||||||||
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- Definition
Represents the reallocation of undistributed earnings during the period. No definition available.
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Details
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