Stockholders' Equity - Employee Stock Purchase Plan (Details) - $ / shares	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014	Mar. 28, 2014	Mar. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future issuance (in shares)				1,550,000	2,306,256
Number of shares issued under the plan (in shares)	760,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	5,200,000.0
Minimum weekly employment threshold to qualify for ESPP	20 hours
Minimum annual employment threshold to qualify for ESPP	5 months
Maximum percentage of employee compensation eligible to purchase shares under ESPP (percent)	15.00%
Purchase price of common stock as a percent of fair market value (percent)	85.00%
Cumulative number of shares issued under ESPP (in shares)	4,100,000
Number of shares available for future issuance (in shares)	1,100,000
Average share price of shares issued under the plan	$ 3.47
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term (in years)	6 months	6 months	6 months
Risk-free interest rate, lower range (percent)	0.36%	0.11%	0.07%
Risk-free interest rate, upper range (percent)	0.49%	0.12%	0.10%
Expected volatility, lower range (percent)	53.00%	39.63%	40.14%
Expected volatility, upper range (percent)	55.55%	40.91%	40.23%
Expected dividend yield (percent)	0.00%	0.00%	0.00%
Weighted average grant-date fair value per share (in dollars per share)	$ 1.23	$ 1.43	$ 2.09