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Restatement of the Condensed Consolidated Financial Statements - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Distributor Revenue [Member]
Distributor
Dec. 31, 2012
Distributor Revenue [Member]
Mar. 31, 2013
Inventory Reserves [Member]
Jun. 30, 2012
Inventory Reserves [Member]
Dec. 31, 2012
Inventory Reserves [Member]
Increase (Decrease) in net sales $ 3,100,000 $ 7,100,000          
Increase (Decrease) in net income from continued operation 2,700,000 (3,600,000)          
Distributors that did not meet the fixed or determinable or collectability revenue recognition criteria     4        
Number of distributer terminated     2        
Sales return       3,300,000      
Increase (Decrease) in accounts receivable (8,589,000) 5,423,000 (34,300,000) (41,300,000)      
Increase (Decease) in inventory 2,100,000 1,510,000 8,800,000 11,000,000 (14,800,000)   (14,800,000)
Increase (Decrease) in inventory reserve           $ 1,200,000