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Schedule II - Valuation and Qualifying Accounts (Details) (USD $)
 12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Mar. 31, 2013
Allowance for Sales Returns [Member]
Mar. 31, 2012
Allowance for Sales Returns [Member]
Mar. 31, 2011
Allowance for Sales Returns [Member]
Mar. 31, 2013
Reserve for Credit Losses [Member]
Mar. 31, 2012
Reserve for Credit Losses [Member]
Mar. 31, 2011
Reserve for Credit Losses [Member]
Mar. 31, 2013
Valuation for Deferred Taxes [Member]
Mar. 31, 2012
Valuation for Deferred Taxes [Member]
Mar. 31, 2011
Valuation for Deferred Taxes [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]                        
Balance at Beginning of Period       $ 427,000 [1] $ 347,000 [1] $ 330,000 [1] $ 5,606,000 $ 2,771,000 $ 3,585,000 $ 1,217,000 $ 1,296,000 $ 1,250,000
Charged to Costs and Expenses       1,404,000 [1] 1,054,000 [1] 689,000 [1] (334,000) 3,212,000 85,000 288,000 (79,000) 46,000
Deductions/Write-Offs       (1,288,000) [1] (974,000) [1] (672,000) [1] (144,000) (377,000) (899,000) 0 0 0
Balance at End of Period       543,000 [1] 427,000 [1] 347,000 [1] 5,128,000 5,606,000 2,771,000 1,505,000 1,217,000 1,296,000
Expected merchandise returns $ 3,400,000 $ 3,200,000 $ 2,800,000                  
[1] These amounts represent the gross margin effect of sales returns during the respective years. Expected merchandise returns after year-end for sales made before year-end were $3.4 million, $3.2 million, and $2.8 million as of March 31, 2012, 2011, and 2010, respectively.