Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Additional Information (Detail)

v3.2.0.727
Segment Information - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Customer
Jun. 30, 2014
Customer
Jun. 30, 2015
USD ($)
Customer
Jun. 30, 2014
Customer
Dec. 31, 2014
USD ($)
International          
Segment Reporting Information [Line Items]          
Long-lived assets outside of the United States | $ $ 338,000   $ 338,000   $ 374,000
Sales Revenue, Net          
Segment Reporting Information [Line Items]          
Number of customers which represented more than 10% of the Company's revenue 0 0 0 0  
Sales Revenue, Net | International          
Segment Reporting Information [Line Items]          
Number of customers which represented more than 10% of the Company's revenue     0 0  
Customer Concentration Risk | Sales Revenue, Net | UNITED STATES          
Segment Reporting Information [Line Items]          
Concentration Risk Percentage 62.00% 62.00% 59.00% 60.00%  
Customer Concentration Risk | Sales Revenue, Net | International          
Segment Reporting Information [Line Items]          
Concentration Risk Percentage 38.00% 38.00% 41.00% 40.00%