Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		12 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segment	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Total Net Sales [Member]	Sep. 30, 2013 Total Net Sales [Member]	Sep. 30, 2014 Total Net Sales [Member]	Sep. 30, 2013 Total Net Sales [Member]	Sep. 30, 2014 Customer Concentration Risk [Member] Total Net Sales [Member]	Sep. 30, 2014 Customer Concentration Risk [Member] Total Net Sales [Member]	Sep. 30, 2014 Customer Concentration Risk [Member] Accounts Receivable [Member]	Dec. 31, 2013 Customer Concentration Risk [Member] Accounts Receivable [Member]	Sep. 30, 2013 Distributor [Member] Total Net Sales [Member]	Sep. 30, 2013 Distributor [Member] Total Net Sales [Member]	Sep. 30, 2014 Individual Country Outside of the United States [Member] Geographic Concentration Risk [Member] Total Net Sales [Member] Customer	Sep. 30, 2013 Individual Country Outside of the United States [Member] Geographic Concentration Risk [Member] Total Net Sales [Member] Customer	Sep. 30, 2014 Individual Country Outside of the United States [Member] Geographic Concentration Risk [Member] Total Net Sales [Member] Customer	Sep. 30, 2013 Individual Country Outside of the United States [Member] Geographic Concentration Risk [Member] Total Net Sales [Member] Customer	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 Maximum [Member] Individual Country Outside of the United States [Member] Customer Concentration Risk [Member] Total Net Sales [Member]	Sep. 30, 2013 Maximum [Member] Individual Country Outside of the United States [Member] Customer Concentration Risk [Member] Total Net Sales [Member]	Sep. 30, 2014 Maximum [Member] Individual Country Outside of the United States [Member] Customer Concentration Risk [Member] Total Net Sales [Member]	Sep. 30, 2013 Maximum [Member] Individual Country Outside of the United States [Member] Customer Concentration Risk [Member] Total Net Sales [Member]	Sep. 30, 2014 Minimum [Member]	Sep. 30, 2014 Extended Product Warranty [Member] Maximum [Member]	Sep. 30, 2014 Extended Product Warranty [Member] Minimum [Member]
Summary Of Significant Accounting Policy [Line Items]
Number of reportable segments of company			2
Aggregated operating segments			0
Sales to customers, countries outside of the United States																0	0	0	0
Percentage of risk concentration						100.00%	100.00%	100.00%	100.00%	11.00%	10.00%	27.20%	17.40%	12.20%	12.10%						10.00%	10.00%	10.00%	10.00%
Period of extended warranty after expiration of standard warranty																										5 years	1 year
Service term for services purchased																				5 years					1 year
Contractual Period of entities assurance program																				5 years					3 years
Note receivable in term			5 years
Company receive payment			30 days
Accounts and notes receivable related to purchases	$ 0.8		$ 0.8		$ 0
Warranty period			1 year
Corporate owned life insurance policies fair value	1.0		1.0
Impairment charge	$ 0	$ 0	$ 0	$ 0