XML 65 R47.htm IDEA: XBRL DOCUMENT v3.3.1.900
Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Warranty Costs      
Warranty period 1 year    
Advertising Expense      
Advertising expenses $ 0.9 $ 0.6 $ 0.5
Concentration of Credit Risk      
Allowance for doubtful accounts $ 0.2 0.7  
Maturity period of irrevocable letters of credit, minimum 0 days    
Maturity period of irrevocable letters of credit, maximum 90 days    
Cash, Cash Equivalents, and Short-Term Investments      
Maturity period of short-term investments, minimum 3 months    
Cash equivalents $ 18.0 $ 0.0  
Cash and cash equivalents maintained outside the U.S. by subsidiaries (as a percent) 50.00% 81.00%