Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 24, 2016	Jun. 30, 2017	Jun. 24, 2016
Net sales	$ 159,733	$ 95,365	$ 308,437	$ 168,652
Cost of sales	136,227	80,185	260,916	141,547
Gross profit	23,506	15,180	47,521	27,105
Operating expenses:
Research and development	1,950	1,290	3,694	2,665
Selling, general, and administrative	7,984	7,183	14,842	13,547
Amortization of intangible assets	1,803	1,803	3,598	3,406
Total operating expenses	11,737	10,276	22,134	19,618
Operating income	11,769	4,904	25,387	7,487
Interest expense, net	675	1,160	1,365	2,062
Other expense (income), net	151	244	(398)	(143)
Income from continuing operations before income taxes	10,943	3,500	24,420	5,568
Income tax expense from continuing operations	473	225	998	461
Net income from continuing operations	10,470	3,275	23,422	5,107
Discontinued operations:
Loss from discontinued operations before taxes	(610)	(2,305)	(721)	(4,029)
Income tax expense from discontinued operations		2	1	3
Net loss from discontinued operations	(610)	(2,307)	(722)	(4,032)
Net income	9,860	968	22,700	1,075
Less: Undistributed earnings attributable to preferred shareholders		(963)		(1,070)
Net income attributable to ordinary shareholders	$ 9,860	$ 5	$ 22,700	$ 5
Net income per share from continuing operations attributable to ordinary shareholders, Basic	$ 0.42	$ 0.19	$ 0.95	$ 0.29
Net income per share from continuing operations attributable to ordinary shareholders, Diluted	0.40	0.06	0.91	0.08
Net income per share attributable to ordinary shareholders, Basic	0.40	0.06	0.92	0.07
Net income per share attributable to ordinary shareholders, Diluted	$ 0.38	$ 0.02	$ 0.88	$ 0.02
Shares used to compute net income per share attributable to ordinary shareholders:
Shares used to compute net income per share attributable to ordinary shareholders, Basic	24,848,365	85,589	24,751,390	75,631
Shares used to compute net income per share attributable to ordinary shareholders, Diluted	26,063,527	277,554	25,868,403	285,066
Continuing Operations
Shares used to compute net income per share attributable to ordinary shareholders:
Shares used to compute net income per share attributable to ordinary shareholders, Basic	24,848,365	85,589	24,751,390	75,631
Shares used to compute net income per share attributable to ordinary shareholders, Diluted	26,063,527	277,554	25,868,403	285,066