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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Allowance for Doubtful Accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period $ 1,890 $ 1,833 $ 1,956
Additions charged to expense and other accounts 397 583 728
Amounts charged against reserve (320) (526) (851)
Balance at end of period 1,967 1,890 1,833
Allowance for Sales Returns [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 472 429 516
Additions charged to expense and other accounts 2,621 1,832 1,881
Amounts charged against reserve (2,383) (1,789) (1,968)
Balance at end of period 710 472 429
Valuation Allowance of Deferred Tax Assets [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 3,365 3,563 2,441
Additions charged to expense and other accounts 831 0 3,163
Amounts charged against reserve 0 (198) (2,041)
Balance at end of period $ 4,196 $ 3,365 $ 3,563