Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015
Net sales	$ 655,892	$ 405,747	$ 290,641
Cost of sales	555,131	340,352	242,087
Gross profit	100,761	65,395	48,554
Operating expenses:
Research and development	7,899	6,383	4,813
Selling, general, and administrative	37,802	28,126	24,729
Amortization of intangible assets	8,880	7,015	6,411
Total operating expenses	54,581	41,524	35,953
Operating income	46,180	23,871	12,601
Interest expense, net	3,277	4,370	3,831
Other income, net	(126)	(629)	(46)
Income from continuing operations before income taxes	43,029	20,130	8,816
Income tax benefit from continuing operations	(13,886)	(649)	(3,991)
Net income from continuing operations	56,915	20,779	12,807
Discontinued operations:
Loss from discontinued operations before taxes	(722)	(4,077)	(7,406)
Income tax expense (benefit) from discontinued operations	(261)	40	(225)
Net loss from discontinued operations	(461)	(4,117)	(7,181)
Net income	56,454	16,662	5,626
Less: Preferred share dividend			(22,127)
Less: Undistributed earnings attributable to preferred shareholders		(15,284)
Net income (loss) attributable to ordinary shareholders	$ 56,454	$ 1,378	$ (16,501)
Net income (loss) per share from continuing operations attributable to ordinary shareholders, Basic	$ 2.27	$ 1.14	$ (292.39)
Net income (loss) per share from continuing operations attributable to ordinary shareholders, Diluted	2.17	0.87	(292.39)
Net income (loss) per share attributable to ordinary shareholders, Basic	2.25	0.92	(517.68)
Net income (loss) per share attributable to ordinary shareholders, Diluted	$ 2.15	$ 0.70	$ (517.68)
Shares used to compute net income (loss) from continuing operations per share attributable to ordinary shareholders:
Shares used to compute net income (loss) per share attributable to ordinary shareholders, Basic	25,118,031	1,503,296	31,875
Shares used to compute net income (loss) per share attributable to ordinary shareholders, Diluted	26,218,424	1,967,926	31,875
Continuing Operations
Shares used to compute net income (loss) from continuing operations per share attributable to ordinary shareholders:
Shares used to compute net income (loss) per share attributable to ordinary shareholders, Basic	25,118,031	1,503,296	31,875
Shares used to compute net income (loss) per share attributable to ordinary shareholders, Diluted	26,218,424	1,967,926	31,875