Consolidated Statements of Shareholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]
Balance at Jan. 02, 2016	$ 426,179,000	$ 297,987,000	$ 22,327,000	$ 106,838,000	$ (6,113,000)	$ 5,140,000
Balance, shares at Jan. 02, 2016		85,418,000
Employee Stock Purchase Plan, Value	326,000	$ 326,000	0	0	0	0
Employee Stock Purchase Plan, Shares		67,000
Exercise of options	588,000	$ 1,157,000	(569,000)	0	0	0
Exercise of options, shares		169,000
Stock based compensation	3,173,000	$ 0	3,173,000	0	0	0
Earnings (loss) from continuing operations	(17,138,000)	0	0	(17,142,000)	0	4,000
Earnings (loss) from discontinued operations	(834,000)	0	0	(570,000)	0	(264,000)
Currency translation adjustment	282,000	0	0	0	508,000	(226,000)
Change in Equity Associated with Disposal of Discontinued Operation	(7,148,000)	0	0	0	(5,094,000)	(2,054,000)
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax	0
Balance at Oct. 01, 2016	405,428	$ 299,470	24,931	89,126	(10,699)	2,600
Balance, shares at Oct. 01, 2016		85,654
Balance at Dec. 31, 2016	369,413,000	$ 300,426,000	25,522,000	53,838,000	(13,104,000)	2,731,000
Balance, shares at Dec. 31, 2016		85,744,000
Employee Stock Purchase Plan, Value	281,000	$ 281,000	0	0	0	0
Employee Stock Purchase Plan, Shares		40,000
Exercise of options	4,400,000	$ 7,612,000	(3,212,000)	0	0	0
Exercise of options, shares		889,000
Dividends Preferred Stock Cash	(5,100,000)	$ 0	0	(5,100,000)	0	0
Preferred Stock Accretion To Redemption Value1	(748,000)	0	0	(748,000)	0	0
Stock based compensation	4,133,000	0	4,133,000	0	0	0
Earnings (loss) from continuing operations	(17,169,000)	0	0	(17,833,000)	0	664,000
Currency translation adjustment	4,954,000	0	0	0	5,001,000	(47,000)
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax	257,000	0	0	0	257,000	0
Minority Interest Decrease From Redemptions	(1,737,000)	0	214,000	0	(82,000)	(1,869,000)
Balance at Sep. 30, 2017	358,684,000	$ 308,319,000	$ 26,657,000	$ 30,157,000	$ (7,928,000)	$ 1,479,000
Balance, shares at Sep. 30, 2017		86,673,000
AOCI Including Portion Attributable To Non controlling Interest Tax	$ 110,000