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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 |  |

X
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- Definition The amount of revenue recognized for the period under subleasing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6584307&loc=d3e41620-112719 + Details
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- Definition The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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