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Stock Plans (Details 1) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule of stock-based compensation expense    
Share-based Compensation $ 839us-gaap_ShareBasedCompensation $ 755us-gaap_ShareBasedCompensation
Allocated Share-based Compensation Expense 839us-gaap_AllocatedShareBasedCompensationExpense 755us-gaap_AllocatedShareBasedCompensationExpense
Restricted stock awards    
Schedule of stock-based compensation expense    
Share-based Compensation 427us-gaap_ShareBasedCompensation
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockMember		 439us-gaap_ShareBasedCompensation
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockMember
Restricted stock unit awards    
Schedule of stock-based compensation expense    
Share-based Compensation 175us-gaap_ShareBasedCompensation
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockUnitsRSUMember		  
Restricted stock unit awards | Market-condition restricted stock units    
Schedule of stock-based compensation expense    
Share-based Compensation 34us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= mxwl_MarketConditionRestrictedStockUnitsRSUsMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockUnitsRSUMember		  
Service-based restricted stock awards | Restricted stock awards    
Schedule of stock-based compensation expense    
Share-based Compensation 420us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= mxwl_ServiceBasedRestrictedStockMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockMember		 433us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= mxwl_ServiceBasedRestrictedStockMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockMember
Service-based restricted stock awards | Restricted stock unit awards    
Schedule of stock-based compensation expense    
Share-based Compensation 82us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= mxwl_ServiceBasedRestrictedStockMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockUnitsRSUMember		  
Performance-based restricted stock awards | Restricted stock awards    
Schedule of stock-based compensation expense    
Share-based Compensation 7us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= mxwl_PerformanceBasedRestrictedStockMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockMember		 6us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= mxwl_PerformanceBasedRestrictedStockMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockMember
Performance-based restricted stock awards | Restricted stock unit awards    
Schedule of stock-based compensation expense    
Share-based Compensation 59us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= mxwl_PerformanceBasedRestrictedStockMember
/ us-gaap_PlanNameAxis
= us-gaap_RestrictedStockUnitsRSUMember		  
Cost of revenue    
Schedule of stock-based compensation expense    
Allocated Share-based Compensation Expense 206us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember		 251us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Selling, general and administrative    
Schedule of stock-based compensation expense    
Allocated Share-based Compensation Expense 267us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember		 255us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
Research and development    
Schedule of stock-based compensation expense    
Allocated Share-based Compensation Expense $ 366us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember		 $ 249us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember