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Summary of Information About Stock Options Outstanding and Exercisable (Detail)
12 Months Ended
Dec. 26, 2015
$ / shares
shares
$0.83 - $3.00  
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding By Exercise Price [Line Items]  
Range of Exercise Prices, Minimum $ 0.83
Range of Exercise Prices, Maximum $ 3.00
Options Outstanding | shares 1,579,501
Options Outstanding, Weighted Average Remaining Contractual Life (in years) 1 year 11 months 27 days
Options Outstanding, Weighted Average Exercise Price $ 1.44
Options Exercisable | shares 1,579,501
Options Exercisable, Weighted Average Remaining Contractual Life (in years) 1 year 11 months 27 days
Options Exercisable, Weighted Average Exercise Price $ 1.44
$3.01 - $5.12  
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding By Exercise Price [Line Items]  
Range of Exercise Prices, Minimum 3.01
Range of Exercise Prices, Maximum $ 5.12
Options Outstanding | shares 788,176
Options Outstanding, Weighted Average Remaining Contractual Life (in years) 2 years 1 month 13 days
Options Outstanding, Weighted Average Exercise Price $ 4.34
Options Exercisable | shares 784,622
Options Exercisable, Weighted Average Remaining Contractual Life (in years) 2 years 1 month 10 days
Options Exercisable, Weighted Average Exercise Price $ 4.35
$5.13 (option exchange)  
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding By Exercise Price [Line Items]  
Range of Exercise Prices, Minimum $ 5.13
Options Outstanding | shares 194,805
Options Outstanding, Weighted Average Remaining Contractual Life (in years) 1 year 5 months 12 days
Options Outstanding, Weighted Average Exercise Price $ 5.13
Options Exercisable | shares 194,805
Options Exercisable, Weighted Average Remaining Contractual Life (in years) 1 year 5 months 12 days
Options Exercisable, Weighted Average Exercise Price $ 5.13
$5.14 - $8.00  
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding By Exercise Price [Line Items]  
Range of Exercise Prices, Minimum 5.14
Range of Exercise Prices, Maximum $ 8.00
Options Outstanding | shares 2,904,615
Options Outstanding, Weighted Average Remaining Contractual Life (in years) 5 years 11 months 9 days
Options Outstanding, Weighted Average Exercise Price $ 5.66
Options Exercisable | shares 2,237,948
Options Exercisable, Weighted Average Remaining Contractual Life (in years) 5 years 4 months 10 days
Options Exercisable, Weighted Average Exercise Price $ 5.79
$8.01 - $11.27  
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding By Exercise Price [Line Items]  
Range of Exercise Prices, Minimum 8.01
Range of Exercise Prices, Maximum $ 11.27
Options Outstanding | shares 312,500
Options Outstanding, Weighted Average Remaining Contractual Life (in years) 1 year 2 months 12 days
Options Outstanding, Weighted Average Exercise Price $ 9.64
Options Exercisable | shares 312,500
Options Exercisable, Weighted Average Remaining Contractual Life (in years) 1 year 2 months 12 days
Options Exercisable, Weighted Average Exercise Price $ 9.64
$0.83 - $11.27  
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding By Exercise Price [Line Items]  
Range of Exercise Prices, Minimum 0.83
Range of Exercise Prices, Maximum $ 11.27
Options Outstanding | shares 5,779,597
Options Outstanding, Weighted Average Remaining Contractual Life (in years) 3 years 11 months 5 days
Options Outstanding, Weighted Average Exercise Price $ 4.53
Options Exercisable | shares 5,109,376
Options Exercisable, Weighted Average Remaining Contractual Life (in years) 3 years 5 months 1 day
Options Exercisable, Weighted Average Exercise Price $ 4.43