Discontinued Operations - Additional Information (Detail) (USD $)			3 Months Ended		3 Months Ended	6 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 28, 2013	Dec. 31, 2012	Mar. 29, 2013 HFC business [Member]	Jun. 28, 2013 HFC business [Member]	Jun. 28, 2013 Aurora [Member]	Jun. 28, 2013 Aurora [Member]	Mar. 05, 2013 Aurora [Member] HFC business [Member]	Mar. 29, 2013 Aurora [Member] HFC business [Member]	Jun. 28, 2013 Aurora [Member] HFC business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross proceeds from sale of cable access HFC business							$ 46,000,000
Net gain from sale of HFC business								15,000,000	14,800,000
Adjustments on inventory and fixed assets									(200,000)
Total TSA billing to Aurora					600,000	928,000
Prepaid expenses and other current assets	19,727,000	23,636,000			45,000	45,000
Receivables from customers					1,800,000	1,800,000
Accrued liabilities					2,200,000	2,200,000
Payable to third party vendors for purchases					0	0
Goodwill impairment loss			0
Carrying value of goodwill based on the fair value	$ 14,547,000			$ 14,547,000