Income Taxes - Textual (Details) - USD ($)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Taxes (Textual) [Abstract]
Excess benefits due to stock option exercise	$ 0
Change in amount of operating loss carryforwards valuation allowance	1,600,000	$ 23,900,000
Increase in valuation allowance for deferred tax assets		21,100,000
Undistributed earnings from non-U.S. operations	6,500,000
Maximum amount company recognize from unrecognized tax benefit	6,961,000	$ 6,442,000	$ 4,436,000	$ 3,464,000
Unrecognized tax benefits that would impact effective tax rate if recognized	800,000
Federal [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	9,900,000
State research and experimental tax credit carryforward	7,500,000
Federal [Member] | Excess Tax Benefit Related to Exercise of Stock Option [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	1,400,000
California [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	39,500,000
State research and experimental tax credit carryforward	6,900,000
California [Member] | Excess Tax Benefit Related to Exercise of Stock Option [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	3,000,000
State research and experimental tax credit carryforward	200,000
Foreign Tax Authority [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	38,500,000
Foreign Tax Authority [Member] | Excess Tax Benefit Related to Exercise of Stock Option [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	$ 1,600,000