Business Segments (Details) (USD $)	0 Months Ended	3 Months Ended					6 Months Ended	9 Months Ended
	Jun. 24, 2013	Sep. 28, 2014		Sep. 29, 2013		Mar. 31, 2013	Jun. 30, 2013	Sep. 28, 2014		Sep. 29, 2013
Segment Reporting Information [Line Items]
Net revenues		$ 160,595,000		$ 174,888,000				$ 478,926,000		$ 495,351,000
Gross profit		70,965,000		70,532,000				205,758,000		193,689,000
Operating expenses		60,201,000	[1]	56,951,000	[2]			179,841,000	[3]	175,935,000	[4]
Interest expense, net		(739,000)		(2,682,000)				(2,642,000)		(7,772,000)
Other gain (loss), net		10,000		(1,002,000)				(518,000)		(3,513,000)
Earnings from continuing operations before income taxes		10,035,000		9,897,000				22,757,000		6,469,000
Restructuring expenses		459,000		937,000				2,692,000		4,582,000
Acquisition costs		291,000		253,000				291,000		694,000
CFO Transition Charge							1,200,000
Benefit due to reversal of accrued litigation reserve		0		0		6,600,000		0		6,584,000
Gain on sale of subsidiary	200,000							0		248,000
Product Concentration Risk | Sales Revenue, Product Line
Segment Reporting Information [Line Items]
Concentration risk, percentage		10.00%		10.00%				10.00%		10.00%
Merchandise Availability Solutions
Segment Reporting Information [Line Items]
Net revenues		107,494,000	[5]	117,625,000	[6]			312,436,000	[7]	323,479,000	[8]
Gross profit		52,212,000		51,979,000				147,416,000		139,713,000
Merchandise Availability Solutions | Electronic Article Surveillance (EAS) Systems
Segment Reporting Information [Line Items]
Net revenues		43,500,000		43,700,000				130,100,000		136,000,000
Merchandise Availability Solutions | Alpha Business
Segment Reporting Information [Line Items]
Net revenues		29,300,000		35,400,000				84,800,000		89,400,000
Merchandise Availability Solutions | Electronic Article Surveillance (EAS) Consumables
Segment Reporting Information [Line Items]
Net revenues		24,500,000		24,400,000				77,200,000		73,000,000
Apparel Labeling Solutions
Segment Reporting Information [Line Items]
Net revenues		41,427,000		45,442,000				131,167,000		134,717,000
Gross profit		14,248,000		14,742,000				45,584,000		40,289,000
Retail Merchandising Solutions
Segment Reporting Information [Line Items]
Net revenues		11,674,000		11,821,000				35,323,000		37,155,000
Gross profit		$ 4,505,000		$ 3,811,000				$ 12,758,000		$ 13,687,000

[1] Includes a $0.5 million restructuring charge, and a $0.3 million acquisition charge.

[2] Includes a $0.9 million restructuring charge, and a $0.3 million acquisition charge.

[3] Includes a $2.7 million restructuring charge, and a $0.3 million acquisition charge.

[4] Includes a $4.6 million restructuring charge, a $1.2 million charge related to our CFO transition, a $0.7 million acquisition charge, a benefit of $6.6 million due to a litigation accrual reversal, and a $0.2 million gain on sale of our interest in the non-strategic Sri Lanka Subsidiary.

[5] Includes net revenue from EAS systems, Alpha® and EAS consumables of $43.5 million, $29.3 million and $24.5 million, respectively, representing more than 10% of total revenue.

[6] Includes net revenue from EAS systems, Alpha® and EAS consumables of $43.7 million, $35.4 million and $24.4 million, respectively, representing more than 10% of total revenue.

[7] Includes net revenue from EAS systems, Alpha® and EAS consumables of $130.1 million, $84.8 million and $77.2 million, respectively, representing more than 10% of total revenue.

[8] Includes net revenue from EAS systems, Alpha® and EAS consumables of $136.0 million, $89.4 million and $73.0 million, respectively, representing more than 10% of total revenue.