Restatement of the Consolidated Financial Statements - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended					3 Months Ended								12 Months Ended			1 Months Ended		12 Months Ended								12 Months Ended
	Jan. 02, 2010	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Inventory Reserves [Member]	Dec. 31, 2011 Inventory Reserves [Member]	Dec. 31, 2012 Previously Reported [Member]	Sep. 30, 2012 Previously Reported [Member]	Jun. 30, 2012 Previously Reported [Member]	Mar. 31, 2012 Previously Reported [Member]	Dec. 31, 2011 Previously Reported [Member]	Sep. 30, 2011 Previously Reported [Member]	Jun. 30, 2011 Previously Reported [Member]	Mar. 31, 2011 Previously Reported [Member]	Dec. 31, 2012 Previously Reported [Member]	Dec. 31, 2011 Previously Reported [Member]	Dec. 31, 2010 Previously Reported [Member]	May 31, 2012 Term Loan Facility [Member]	May 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2012 Distributor Revenue [Member] Distributor	Dec. 31, 2011 Distributor Revenue [Member]	Dec. 31, 2012 Distributor Revenue [Member] Previously Reported [Member]	Dec. 31, 2011 Distributor Revenue [Member] Previously Reported [Member]	Dec. 31, 2010 Distributor Revenue [Member] Previously Reported [Member]	Dec. 31, 2012 Distributor Revenue [Member] Minimum [Member]	Dec. 31, 2012 Distributor Revenue [Member] Maximum [Member]	Dec. 31, 2012 Other [Member]
Increase (Decrease) in net sales										$ (14,700,000)	$ (28,200,000)	$ 1,900,000
Increase (Decrease) in net income from continuing operations										(8,900,000)	(14,500,000)	3,200,000
Increase (Decrease) in retained earnings	8,300,000
Increase (Decrease) in total stockholders' equity	7,600,000
Net Sales		117,365,000	107,857,000	113,423,000	108,936,000	118,639,000	111,510,000	108,216,000	103,606,000	447,581,000	441,971,000	462,571,000			112,035,000	114,752,000	119,492,000	116,041,000	123,085,000	117,306,000	116,670,000	113,060,000	462,320,000	470,121,000	460,629,000						462,320,000	470,121,000	460,629,000
Percentage of net sales																																		11.00%	13.00%
Number of distributer terminated																													2
Sales return																													3,300,000	4,100,000
Distributors that did not meet the fixed or determinable or collectability revenue recognition criteria																													4
Increase (Decrease) in accounts receivable										18,438,000	(293,000)	16,645,000																	(41,300,000)	(33,800,000)
Increase (Decease) in inventory										2,495,000	12,624,000	(9,767,000)	(14,800,000)	(8,800,000)															11,000,000	8,800,000
Increase (Decrease) in inventory reserve													1,200,000
Repayment of debt obligation										188,695,000	7,500,000	36,269,000														87,500,000
Repayment of debt obligation																											57,500,000	20,000,000
Adjustment to reclassify interest expenses											3,900,000	4,900,000
Increase in cash flow related to operating activities																																				1,000,000
Decrease in cash flow related to financing activities																																				$ (1,000,000)