Post-effective amendment to a registration statement that is not immediately effective upon filing

Income Taxes (Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits) (Details)

v2.4.1.9
Income Taxes (Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of the beginning and ending amount of unrecognized tax benefits    
Balance at the beginning of the year $ 93us-gaap_UnrecognizedTaxBenefits $ 72us-gaap_UnrecognizedTaxBenefits
Increase (decrease) of unrecognized tax benefits taken in prior years 4ekso_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions   
Increase (decrease) of unrecognized tax benefits taken in current year 46ekso_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromCurrentPeriodTaxPositions 21ekso_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromCurrentPeriodTaxPositions
Increase (decrease) of unrecognized tax benefits related to settlements      
Reductions to unrecognized tax benefits related lapsing statute of limitations      
Balance at the end of the year $ 143us-gaap_UnrecognizedTaxBenefits $ 93us-gaap_UnrecognizedTaxBenefits