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Note 12 - Lease Commitments (Details Textual)
9 Months Ended
Nov. 30, 2016
USD ($)
ft²
Feb. 29, 2016
USD ($)
ft²
Jan. 31, 2017
USD ($)
ft²
Jan. 31, 2016
USD ($)
Sep. 30, 2021
USD ($)
Operating Leases, Rent Expense     $ 1,252,000 $ 951,000  
Sublease to American Building Maintenance Industries, Incorporated [Member]          
Area of Real Estate Property | ft² 24,726        
Operating Leases, Annual Base Rent $ 1,126,000        
Base Rent Increase, Percent 2.25%        
Security Deposit $ 469,000        
Annual Rental Expenditure, Initial, Decrease, Percentage 23.00%        
Lessee Leasing Arrangements, Allowance $ 417,000        
Sublease to American Building Maintenance Industries, Incorporated [Member] | Scenario, Forecast [Member]          
Security Deposit         $ 305,000
Seagis Property Group LP (the "Landlord") [Member]          
Area of Real Estate Property | ft²     24,110    
Seagis Property Group LP (the "Landlord") [Member] | Value Line Distribution Center ("VLDC") [Member]          
Area of Real Estate Property | ft²   24,110      
Operating Leases, Annual Base Rent   $ 192,880      
Security Deposit   32,146      
Base Rent Increase Amount   $ 237,218