Business Segments (Details) (USD $)	3 Months Ended		9 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 30, 2012	Dec. 25, 2011
Business Segments [Abstract]
Number of reportable segments			2
Number of product categories			4
Segment Reporting Information [Line Items]
Revenues	$ 204,459,000	$ 226,250,000	$ 594,115,000	$ 538,603,000
Revenues, excluding Tier 1 carrier market	139,466,000	118,318,000	384,426,000	334,769,000
Gross profit	38,969,800	39,476,800	113,088,000	110,667,100
Gross profit, excluding Tier 1 carrier market	34,232,000	28,985,000	94,511,000	84,883,000
Directly allocatable expenses	18,855,000	19,080,000	54,197,000	52,944,000
Segment net profit contribution	20,115,000	20,397,000	58,891,000	57,723,000
Corporate support expenses	11,385,000	12,590,000	34,562,000	36,739,000
Income before provision for income taxes	8,729,800	7,807,000	24,329,200	20,983,900
Revenue and Gross Profit from External Customer [Line Items]
Revenue from external customers	204,459,000	226,250,000	594,115,000	538,603,000
Gross profit	38,969,800	39,476,800	113,088,000	110,667,100
Base Station Infrastructure [Member]
Segment Reporting Information [Line Items]
Gross profit	17,726,000	15,504,000	48,886,000	45,407,000
Revenue and Gross Profit from External Customer [Line Items]
Revenue from external customers	61,400,000	50,237,000	167,580,000	146,909,000
Gross profit	17,726,000	15,504,000	48,886,000	45,407,000
Network Systems [Member]
Segment Reporting Information [Line Items]
Gross profit	3,784,000	4,073,000	11,422,000	11,718,000
Revenue and Gross Profit from External Customer [Line Items]
Revenue from external customers	19,649,000	18,861,000	59,551,000	57,474,000
Gross profit	3,784,000	4,073,000	11,422,000	11,718,000
Installation, Test and Maintenance [Member]
Segment Reporting Information [Line Items]
Gross profit	3,077,000	2,736,000	8,443,000	7,655,000
Revenue and Gross Profit from External Customer [Line Items]
Revenue from external customers	13,357,000	12,112,000	36,137,000	34,188,000
Gross profit	3,077,000	2,736,000	8,443,000	7,655,000
Mobile device accessories [Member]
Segment Reporting Information [Line Items]
Gross profit	14,383,000	17,164,000	44,337,000	45,887,000
Revenue and Gross Profit from External Customer [Line Items]
Revenue from external customers	110,053,000	145,040,000	330,847,000	300,032,000
Gross profit	14,383,000	17,164,000	44,337,000	45,887,000
Public Carrier, Contractor and Program Manager Market [Member]
Segment Reporting Information [Line Items]
Revenues	32,554,000	18,573,000	78,383,000	56,804,000
Gross profit	6,832,000	4,336,000	16,925,000	12,995,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	6,832,000	4,336,000	16,925,000	12,995,000
Private System Operator and Government Market [Member]
Segment Reporting Information [Line Items]
Revenues	30,199,000	33,617,000	94,063,000	96,158,000
Gross profit	8,476,000	8,632,000	25,867,000	26,764,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	8,476,000	8,632,000	25,867,000	26,764,000
Commercial Dealer and Reseller Market [Member]
Segment Reporting Information [Line Items]
Revenues	36,786,000	32,724,000	104,049,000	92,861,000
Gross profit	10,227,000	8,784,000	28,826,000	25,896,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	10,227,000	8,784,000	28,826,000	25,896,000
Retailer, Dealer Agent and Tier 2-3 Carrier Market [Member]
Segment Reporting Information [Line Items]
Revenues	39,927,000	33,404,000	107,931,000	88,946,000
Gross profit	8,697,000	7,233,000	22,893,000	19,228,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	8,697,000	7,233,000	22,893,000	19,228,000
Tier 1 Carrier Market [Member]
Segment Reporting Information [Line Items]
Revenues	64,993,000	107,932,000	209,689,000	203,834,000
Gross profit	4,738,000	10,492,000	18,577,000	25,784,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	4,738,000	10,492,000	18,577,000	25,784,000
Commercial [Member]
Segment Reporting Information [Line Items]
Revenues	99,539,000	84,914,000	276,495,000	245,823,000
Revenues, excluding Tier 1 carrier market	99,539,000	84,914,000	276,495,000	245,823,000
Gross profit	25,535,000	21,752,000	71,618,000	65,655,000
Gross profit, excluding Tier 1 carrier market	25,535,000	21,752,000	71,618,000	65,655,000
Directly allocatable expenses	11,434,000	10,400,000	32,246,000	30,747,000
Segment net profit contribution	14,101,000	11,352,000	39,372,000	34,908,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	25,535,000	21,752,000	71,618,000	65,655,000
Commercial [Member] | Public Carrier, Contractor and Program Manager Market [Member]
Segment Reporting Information [Line Items]
Revenues	32,554,000	18,573,000	78,383,000	56,804,000
Gross profit	6,832,000	4,336,000	16,925,000	12,995,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	6,832,000	4,336,000	16,925,000	12,995,000
Commercial [Member] | Private System Operator and Government Market [Member]
Segment Reporting Information [Line Items]
Revenues	30,199,000	33,617,000	94,063,000	96,158,000
Gross profit	8,476,000	8,632,000	25,867,000	26,764,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	8,476,000	8,632,000	25,867,000	26,764,000
Commercial [Member] | Commercial Dealer and Reseller Market [Member]
Segment Reporting Information [Line Items]
Revenues	36,786,000	32,724,000	104,049,000	92,861,000
Gross profit	10,227,000	8,784,000	28,826,000	25,896,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	10,227,000	8,784,000	28,826,000	25,896,000
Commercial [Member] | Retailer, Dealer Agent and Tier 2-3 Carrier Market [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	0	0	0
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	0	0	0	0
Commercial [Member] | Tier 1 Carrier Market [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	0	0	0
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	0	0	0	0
Retail [Member]
Segment Reporting Information [Line Items]
Revenues	104,920,000	141,336,000	317,620,000	292,780,000
Revenues, excluding Tier 1 carrier market	39,927,000	33,404,000	107,931,000	88,946,000
Gross profit	13,435,000	17,725,000	41,470,000	45,012,000
Gross profit, excluding Tier 1 carrier market	8,697,000	7,233,000	22,893,000	19,228,000
Directly allocatable expenses	7,421,000	8,680,000	21,951,000	22,197,000
Segment net profit contribution	6,014,000	9,045,000	19,519,000	22,815,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	13,435,000	17,725,000	41,470,000	45,012,000
Retail [Member] | Public Carrier, Contractor and Program Manager Market [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	0	0	0
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	0	0	0	0
Retail [Member] | Private System Operator and Government Market [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	0	0	0
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	0	0	0	0
Retail [Member] | Commercial Dealer and Reseller Market [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	0	0	0
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	0	0	0	0
Retail [Member] | Retailer, Dealer Agent and Tier 2-3 Carrier Market [Member]
Segment Reporting Information [Line Items]
Revenues	39,927,000	33,404,000	107,931,000	88,946,000
Gross profit	8,697,000	7,233,000	22,893,000	19,228,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	8,697,000	7,233,000	22,893,000	19,228,000
Retail [Member] | Tier 1 Carrier Market [Member]
Segment Reporting Information [Line Items]
Revenues	64,993,000	107,932,000	209,689,000	203,834,000
Gross profit	4,738,000	10,492,000	18,577,000	25,784,000
Revenue and Gross Profit from External Customer [Line Items]
Gross profit	$ 4,738,000	$ 10,492,000	$ 18,577,000	$ 25,784,000