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Schedule of Restricted Stock and Restricted Stock Units Activity (Details) - 6 months ended Jun. 28, 2015 - $ / shares
shares in Thousands
Total
Number of Shares  
Nonvested at beginning of period, in shares 650
Granted, in shares 318
Vested, in shares (54)
Forfeited, in shares (35)
Nonvested at end of period, in shares 879
Weighted Average Grant Date Fair Value  
Nonvested at beginning of period, in dollars per share $ 3.47
Granted, in dollars per share 1.85
Vested, in dollars per share 2.04
Forfeited, in dollars per share 0.00
Nonvested at end of period, in dollars per share $ 3.10