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Note 9 - Lease Commitments (Details Textual)
12 Months Ended
Feb. 29, 2016
USD ($)
ft²
Aug. 16, 2013
USD ($)
Feb. 07, 2013
ft²
Apr. 30, 2016
USD ($)
Apr. 30, 2015
USD ($)
Apr. 30, 2014
USD ($)
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Citibank, N.A. (The "Sublandlord") [Member]                
Operating Lease Future Minimum Sublease Rental             $ 122,355 $ 122,355
Area of Land for Lease | ft²     44,493          
Operating Leases, Income Statement, Sublease Revenue   $ 1,468,269            
Security Deposit   $ 489,423            
Seagis Property Group LP (the "Landlord") [Member] | Value Line Distribution Center ("VLDC") [Member]                
Area of Land for Lease | ft² 24,110              
Operating Leases, Income Statement, Sublease Revenue $ 192,880              
Security Deposit 32,146              
Base Rent Increase Amount $ 237,218              
Operating Leases, Rent Expense       $ 1,268,000 $ 1,268,000 $ 2,213,000    
Additional Short Term Overlapping Rent Expense           $ 771,000