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Note 4 - Stockholders' Equity (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 3 Months Ended | 1 Months Ended | ||
|---|---|---|---|---|---|
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Feb. 27, 2015
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Mar. 31, 2015
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Mar. 31, 2014
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Feb. 19, 2015
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Jan. 22, 2015
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| Common Stock, Dividends, Per Share, Declared | $ 0.02us-gaap_CommonStockDividendsPerShareDeclared | $ 0.02us-gaap_CommonStockDividendsPerShareDeclared | $ 0.005us-gaap_CommonStockDividendsPerShareDeclared | ||
| George K. Broady [Member] | |||||
| Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |
5.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = nhtc_GeorgeKBroadyMember |
5.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = nhtc_GeorgeKBroadyMember |
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| Treasury Stock, Shares, Acquired |
91,817us-gaap_TreasuryStockSharesAcquired / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = nhtc_GeorgeKBroadyMember |
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| Stock Repurchase Program, Number of Shares Repurchased Per Day |
5,000nhtc_StockRepurchaseProgramNumberOfSharesRepurchasedPerDay / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = nhtc_GeorgeKBroadyMember |
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| Treasury Stock, Value, Acquired, Cost Method |
$ 1.1us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = nhtc_GeorgeKBroadyMember |
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| X | ||||||||||
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- Definition
The number of shares acquired per day under a share repurchase program. No definition available.
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| X | ||||||||||
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- Definition
Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available.
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| X | ||||||||||
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- Definition
Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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