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Equity and Stock-Based Compensation (Details 2) (Warrant [Member], Performance Shares [Member], USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Warrant [Member] | Performance Shares [Member]
   
Outstanding at January 1, 2015 - Shares 1,481,364nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Granted - Shares 0nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Exercised - Shares 0nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsExercisedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Forfeited or expired - Shares (975,000)nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsForfeituresAndExpirationsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Outstanding at March 31, 2015 -Shares 506,364nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
1,481,364nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Exercisable at March 31, 2015 - Shares 501,364nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Weighted-Average Exercise Price, Outstanding, Beginning $ 1.2nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Granted - Weighted - Average Exercise Price $ 0nuot_ShareBasedCompensationArrangementsByShareBasedPaymentAwardWarrantsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Exercised - Weighted - Average Exercise Price $ 0nuot_Sharebasedcompensationarrangementsbysharebasedpaymentawardwarrantsexercisesinperiodweightedaverageexerciseprice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Forfeited or expired - Weighted - Average Exercise Price $ 1.5nuot_Sharebasedcompensationarrangementbysharebasedpaymentawardwarrantsforfeituresandexpirationsinperiodweightedaverageexerciseprice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Weighted-Average Exercise Price, Outstanding, Ending $ 0.61nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.2nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Exercisable - Weighted - Average Exercise Price $ 0.61nuot_Sharebasedcompensationarrangementbysharebasedpaymentawardwarrantsexercisableweightedaverageexerciseprice
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Outstanding - Weighted-Average Remaining Contractual Term 3 years 4 months 24 days 1 year 3 months 18 days
Exercisable - Weighted-Average Remaining Contractual Term 3 years 4 months 24 days  
Outstanding - Aggregate Intrinsic Value $ 0nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 0nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsOutstandingIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Exercisable - Aggregate Intrinsic Value $ 0nuot_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsExercisableIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember