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Note 11 - Major Customers - Summary of Major Customers (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]
12 Months Ended
Mar. 31, 2019
Apr. 01, 2018
Wal-Mart Stores, Inc. [Member]    
Sales, percent 41.00% 39.00%
Amazon.com, Inc. [Member]    
Sales, percent 16.00% 11.00%
Target Corporation [Member]    
Sales, percent 10.00% [1]
Toys R Us [Member]    
Sales, percent [1] 15.00%
[1] Amount represented less than 10% of the Company's gross sales for this fiscal year.