Stockholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended			1 Months Ended					1 Months Ended		12 Months Ended
	Apr. 24, 2012	Mar. 30, 2012	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2011	Apr. 24, 2012 Maximum [Member]	Dec. 31, 2010 Acquisition of Omneon [Member]	Dec. 31, 2012 Omneon [Member]	Sep. 15, 2010 Omneon [Member]	Jul. 31, 2012 Series A Participating Preferred Stock [Member]	Feb. 19, 2013 Common Stock [Member] Subsequent Event [Member]	Jan. 28, 2013 Common Stock [Member] Subsequent Event [Member]	Dec. 31, 2010 Common Stock [Member] Acquisition of Omneon [Member]
Class of Stock [Line Items]
Preferred stock authorized			5,000,000		5,000,000					100,000
Stockholder rights plan, period			10 years
Stockholder rights plan, expiry date			July 2012
Common stock, shares issued													14,150,122
Purchase price paid as common stocks							$ 2,125,000	$ 2,100,000					$ 95,900,000
Cash deposited to secure post-closing indemnification obligations of holders									21,000,000
Number of common stock deposited to secure post-closing indemnification obligations of holders			1,926,920	1,926,920
Claim for reimbursement received from escrow		800,000
Reimbursement received from escrow common stock shares		40,372
Reimbursement received from escrow common stock value		300,000
Reimbursement received from escrow in cash		500,000
Authorized stock repurchase value	25,000,000		135,000,000
Maximum period under stock repurchase program						18 months
Common stock repurchased and retired, shares			5,100,000
Common stock repurchased and retired, per shares value			$ 4.43
Common stock repurchased and retired, aggregate value			22,600,000
Common stock repurchase program, authorized amount remaining			2,400,000
Increase in stock repurchase program											$ 35,000,000	$ 75,000,000
Common stock repurchases program expire date			July, 2014