Description of Business and Summary of Significant Accounting Policies (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Revenue from U.S., Canadian and all other international dealers and distributors combined    
Total revenue $ 31,855 $ 26,571
International revenue (excluding Canada) as a percent of total revenue 22.00% 21.00%
United States
   
Revenue from U.S., Canadian and all other international dealers and distributors combined    
Total revenue 21,547 17,702
Canada
   
Revenue from U.S., Canadian and all other international dealers and distributors combined    
Total revenue 3,239 3,345
All other international sources
   
Revenue from U.S., Canadian and all other international dealers and distributors combined    
Total revenue $ 7,069 $ 5,524