Annual report pursuant to Section 13 and 15(d)

National Holdings Corporation - Amortization is calculated using the straight-line method over the estimated useful lives (Detail)

v3.8.0.1
National Holdings Corporation - Amortization is calculated using the straight-line method over the estimated useful lives (Detail)
12 Months Ended
Dec. 31, 2017
Trademarks [Member]  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 10 years
Customer Lists [Member]  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 6 years