XML 48 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 1 - Basis of Presentation (Details) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2015
Mar. 31, 2015
Sep. 30, 2014
Mar. 31, 2014
Mar. 31, 2014
Reverse Stock Split [Member]          
Note 1 - Basis of Presentation (Details) [Line Items]          
Stockholders' Equity Note, Stock Split, Conversion Ratio 10us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= nhld_ReverseStockSplitMember
10us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= nhld_ReverseStockSplitMember
     
Gilman [Member]          
Note 1 - Basis of Presentation (Details) [Line Items]          
Goodwill, Purchase Accounting Adjustments     $ 2,066,000us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= nhld_GilmanMember
   
Increase (Decrease) in Intangible Assets, Current       $ 324,000us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent
/ us-gaap_BusinessAcquisitionAxis
= nhld_GilmanMember
$ 593,000us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent
/ us-gaap_BusinessAcquisitionAxis
= nhld_GilmanMember