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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2014
Jun. 30, 2014
Segment
Source
Mar. 31, 2013
Dec. 31, 2013
Jun. 30, 2014
Total Net Sales [Member]
Jun. 30, 2013
Total Net Sales [Member]
Jun. 30, 2014
Total Net Sales [Member]
Jun. 30, 2013
Total Net Sales [Member]
Jun. 30, 2014
Customer Concentration Risk [Member]
Total Net Sales [Member]
Jun. 30, 2014
Customer Concentration Risk [Member]
Total Net Sales [Member]
Jun. 30, 2014
Customer Concentration Risk [Member]
Accounts Receivable [Member]
Dec. 31, 2013
Customer Concentration Risk [Member]
Accounts Receivable [Member]
Jun. 30, 2013
Distributor [Member]
Total Net Sales [Member]
Jun. 30, 2013
Distributor [Member]
Total Net Sales [Member]
Jun. 30, 2014
Individual Country Outside of the United States [Member]
Geographic Concentration Risk [Member]
Total Net Sales [Member]
Customer
Jun. 30, 2013
Individual Country Outside of the United States [Member]
Geographic Concentration Risk [Member]
Total Net Sales [Member]
Customer
Jun. 30, 2014
Individual Country Outside of the United States [Member]
Geographic Concentration Risk [Member]
Total Net Sales [Member]
Customer
Jun. 30, 2013
Individual Country Outside of the United States [Member]
Geographic Concentration Risk [Member]
Total Net Sales [Member]
Customer
Jun. 30, 2014
Minimum [Member]
Jun. 30, 2014
Maximum [Member]
Jun. 30, 2014
Maximum [Member]
Individual Country Outside of the United States [Member]
Customer Concentration Risk [Member]
Total Net Sales [Member]
Jun. 30, 2013
Maximum [Member]
Individual Country Outside of the United States [Member]
Customer Concentration Risk [Member]
Total Net Sales [Member]
Jun. 30, 2014
Maximum [Member]
Individual Country Outside of the United States [Member]
Customer Concentration Risk [Member]
Total Net Sales [Member]
Jun. 30, 2013
Maximum [Member]
Individual Country Outside of the United States [Member]
Customer Concentration Risk [Member]
Total Net Sales [Member]
Jun. 30, 2014
Extended Product Warranty [Member]
Minimum [Member]
Jun. 30, 2014
Extended Product Warranty [Member]
Maximum [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% 10.00% 10.00% 10.80% 17.40% 12.10% 13.10%             10.00% 10.00% 10.00% 10.00%    
Number of revenue sources   2                                                
Period of extended warranty after expiration of standard warranty                                                 1 year 5 years
Service term for services purchased                                     1 year 5 years            
Contractual Period of entities assurance program                                     3 years 5 years            
Note receivable in term   5 years                                                
Company receive payment   30 days                                                
Accounts and notes receivable related to purchases   $ 1.2   $ 0                                            
Warranty period   1 year                                                
Corporate owned life insurance policies fair value   0.8                                                
Impairment charge