Restructuring Charges - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended			3 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2013 Employee	Sep. 30, 2013 Employee	Mar. 31, 2013 Facility	Dec. 31, 2012	Sep. 30, 2013 Cost of Goods Sold	Sep. 30, 2013 Facilities	Dec. 31, 2012 Facilities	Mar. 31, 2013 Restructuring	Sep. 30, 2013 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges related to factory impairment								$ 300,000
Number of facilities closed			1
Restructuring Obligation	623,000	623,000				236,000
Number of employees reduced	67	67
Percentage of Employees reduced	3.00%	3.00%
Restructuring charges	$ 450,000	$ 775,000			$ 500,000				$ 1,100,000