Annual report pursuant to Section 13 and 15(d) 12-31-2014

Stock-Based Compensation - Summary of Employee Stock-Based Compensation Expense (Details)

v2.4.1.9
Stock-Based Compensation - Summary of Employee Stock-Based Compensation Expense (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense $ 11,001,000us-gaap_AllocatedShareBasedCompensationExpense $ 555,000us-gaap_AllocatedShareBasedCompensationExpense
Cost of revenue    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense 317,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= amda_CostOfRevenueMember
 
Research and development    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense 1,318,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
56,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
General and administrative    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense 6,244,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
224,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
Selling and marketing    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense 2,338,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingAndMarketingExpenseMember
273,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingAndMarketingExpenseMember
Capitalized into inventory    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense $ 784,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= amda_CapitalizedIntoInventoryMember
$ 2,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= amda_CapitalizedIntoInventoryMember