Financial Statements of Parent and Subsidiary Guarantors (Details 2) (USD $)	3 Months Ended		12 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Apr. 01, 2011
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$ 8,909,000	$ 38,678,000
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(36,567,000)	(41,306,000)
Payments related to acquisition of businesses, net of cash acquired			(13,500,000)
Cash paid for patents, licenses and other assets	(4,119,000)	(3,851,000)
Net cash (used in) provided by investing activities	(40,686,000)	(45,157,000)
Cash flows from financing activities:
Proceeds from line of credit borrowings	15,000,000
Payments on line of credit		(30,000,000)
Proceeds from issuance of common stock under equity plans	4,469,000	6,198,000
Purchase of common stock in treasury	(2,165,000)	(1,816,000)
Net cash provided by (used in) financing activities	17,304,000	(25,618,000)
Effect of exchange rate changes on cash	96,000	(203,000)
Net increase (decrease) in cash and cash equivalents	(14,377,000)	(32,300,000)
Cash and cash equivalents at beginning of period	40,490,000	89,631,000	89,631,000
Cash and cash equivalents at end of period	26,113,000	57,331,000	40,490,000
Parent Company [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(4,303,000)	7,153,000
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(30,440,000)	(32,065,000)
Cash paid for patents, licenses and other assets	(4,112,000)	(3,851,000)
Investment in subsidiaries	(955,000)	(1,046,000)
Net cash (used in) provided by investing activities	(35,507,000)	(36,962,000)
Cash flows from financing activities:
Proceeds from line of credit borrowings	15,000,000
Payments on line of credit		(30,000,000)
Proceeds from issuance of common stock under equity plans	4,469,000	6,198,000
Purchase of common stock in treasury	(2,165,000)	(1,816,000)
Intercompany long-term financing	11,069,000	31,475,000
Net cash provided by (used in) financing activities	28,373,000	5,857,000
Net increase (decrease) in cash and cash equivalents	(11,437,000)	(23,952,000)
Cash and cash equivalents at beginning of period	24,347,000	66,258,000	66,258,000
Cash and cash equivalents at end of period	12,910,000	42,306,000
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	12,921,000	31,192,000
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(5,897,000)	(8,601,000)
Investment in subsidiaries		100,000
Net cash (used in) provided by investing activities	(5,897,000)	(8,501,000)
Cash flows from financing activities:
Intercompany long-term financing	(11,069,000)	(31,427,000)
Net cash provided by (used in) financing activities	(11,069,000)	(31,427,000)
Net increase (decrease) in cash and cash equivalents	(4,045,000)	(8,736,000)
Cash and cash equivalents at beginning of period	7,600,000	16,216,000	16,216,000
Cash and cash equivalents at end of period	3,555,000	7,480,000
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	291,000	416,000
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(230,000)	(723,000)
Cash paid for patents, licenses and other assets	(7,000)
Investment in subsidiaries		(148,000)
Net cash (used in) provided by investing activities	(237,000)	(871,000)
Cash flows from financing activities:
Intercompany long-term financing	955,000	1,046,000
Net cash provided by (used in) financing activities	955,000	1,046,000
Effect of exchange rate changes on cash	96,000	(203,000)
Net increase (decrease) in cash and cash equivalents	1,105,000	388,000
Cash and cash equivalents at beginning of period	8,543,000	7,157,000	7,157,000
Cash and cash equivalents at end of period	9,648,000	7,545,000
Consolidation Eliminations [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities		(83,000)
Cash flows from investing activities:
Purchase of property, equipment and satellites, net		83,000
Investment in subsidiaries	955,000	1,094,000
Net cash (used in) provided by investing activities	955,000	1,177,000
Cash flows from financing activities:
Intercompany long-term financing	(955,000)	(1,094,000)
Net cash provided by (used in) financing activities	(955,000)	(1,094,000)
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$ 0	$ 0