Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended				12 Months Ended	3 Months Ended
	Mar. 31, 2014 Source Segment	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Total Net Sales [Member]	Mar. 31, 2013 Total Net Sales [Member]	Mar. 31, 2014 Customer Concentration Risk [Member] Total Net Sales [Member]	Mar. 31, 2014 Customer Concentration Risk [Member] Accounts Receivable [Member]	Dec. 31, 2013 Customer Concentration Risk [Member] Accounts Receivable [Member]	Mar. 31, 2013 Distributor [Member] Total Net Sales [Member]	Mar. 31, 2014 Individual Country Outside of the United States [Member] Geographic Concentration Risk [Member] Total Net Sales [Member] Customer	Mar. 31, 2013 Individual Country Outside of the United States [Member] Geographic Concentration Risk [Member] Total Net Sales [Member] Customer	Mar. 31, 2014 Maximum [Member]	Mar. 31, 2014 Maximum [Member] Customer Concentration Risk [Member] Accounts Receivable [Member]	Mar. 31, 2014 Maximum [Member] Individual Country Outside of the United States [Member] Customer Concentration Risk [Member] Total Net Sales [Member]	Mar. 31, 2013 Maximum [Member] Individual Country Outside of the United States [Member] Customer Concentration Risk [Member] Total Net Sales [Member]	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2014 Extended Product Warranty [Member] Maximum [Member]	Mar. 31, 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
Percentage of risk concentration				100.00%	100.00%	10.00%	10.30%	17.40%	13.70%				11.00%	10.00%	10.00%
Number of revenue sources	2
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	$ 0.2		$ 0
Warranty period	1 year
Corporate owned life insurance policies fair value	0.6
Impairment charge