Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Summary of Stock Option Activity) (Details)

v2.4.1.9
Stock-based Compensation Plans and Awards (Summary of Stock Option Activity) (Details) (2014 Plan [Member], USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
2014 Plan [Member]
 
Stock Awards  
Balance as of December 31, 2014 10,791,081us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options granted 285,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options exercised (597,423)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options forfeited (10,126)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options cancelled   
Balance as of March 31, 2015 10,468,532us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Vested and expected to vest at March 31, 2015 9,841,985us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Exercisable as of March 31, 2015 5,457,721us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Weighted-Average Exercise Price  
Balance as of December 31, 2014 $ 0.79us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options granted $ 1.39us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options exercised $ 0.57us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options forfeited $ 1.74us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Options cancelled   
Balance as of March 31, 2015 $ 0.82us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Vested and expected to vest at March 31, 2015 $ 0.80us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Exercisable as of March 31, 2015 $ 0.55us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Weighted-Average Remaining Contractual Life (Years)  
Balance as of March 31, 2015 7 years 7 months 13 days
Vested and expected to vest at March 31, 2015 7 years 6 months 11 days
Exercisable as of March 31, 2015 6 years 5 months 12 days
Aggregate Intrinsic Value  
Balance as of March 31, 2015 $ 8,089us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Vested and expected to vest at March 31, 2015 7,813us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member
Exercisable as of March 31, 2015 $ 5,571us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_PlanNameAxis
= ekso_EquityIncentivePlan2014Member