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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory and Licenses (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2016 USD ($) item | Feb. 29, 2016 USD ($) item | May. 31, 2015 USD ($) | May. 31, 2014 USD ($) | Feb. 29, 2016 USD ($) item | Feb. 28, 2015 USD ($) | Feb. 28, 2014 USD ($)
Summary of significant accounting policies |  |  |  |  |  |  |
General and administrative expenses charged to inventory | $ 39,220 | $ 39,220 |  |  | $ 39,220 | $ 36,370 | $ 36,230
General and administrative expenses directly attributable to the procurement of inventory included in inventory balances | $ 13,050 | 13,050 |  |  | $ 13,050 | 12,520 |
Number of licensors exceeding 10 percent of net sales revenue | item |  |  |  |  | 2 |  |
Non-cash impairment charges |  | $ 3,000 | $ 3,000 | $ 9,000 | $ 6,000 | $ 9,000 | $ 12,049
Supplier concentration risk |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Number of third-party manufacturers | item | 2 | 2 |  |  | 2 |  |
Number of suppliers exceeding 10 percent of product requirements | item |  |  |  |  | 1 |  |
Cost of goods sold manufactured by vendors | Supplier concentration risk | Vendors in Far East |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 68.00% | 67.00% | 69.00%
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top two manufacturers |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 17.00% |  |
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top five suppliers |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 31.00% |  |
Net sales revenue | Net sales revenue subject to trademark license agreements |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 41.00% | 42.00% | 44.00%
Net sales revenue | Net sales revenue subject to trademark license agreements | Top Licensor |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 20.00% |  |
Net sales revenue | Net sales revenue subject to trademark license agreements | Second Top Licensor |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 12.00% |  |
Venezuela |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Non-cash impairment charges | $ 9,160 |  |  |  |  |  |
Venezuela | Inventory |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Non-cash impairment charges | 9,080 |  |  |  |  |  |
Venezuela | Property and equipment |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Non-cash impairment charges | $ 80 |  |  |  |  |  |
Venezuela | Net sales revenue |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 1.40% | 0.70% | 0.60%

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