Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation (Details 3)

v2.4.1.9
Stock Based Compensation (Details 3) (Warrant [Member], Directors and officers [Member], USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Warrant [Member] | Directors and officers [Member]
   
Warrant Shares Available For Grant [Roll Forward]    
Shares Available For Grant, Outstanding, Beginning Balance 3,489,250wkhs_SharesAvailableForGrantWarrantsOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
3,489,250wkhs_SharesAvailableForGrantWarrantsOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Shares Available For Grant, Additional stock reserved      
Shares Available For Grant, Granted      
Shares Available For Grant, Exercised      
Shares Available For Grant, Forfeited      
Shares Available For Grant Warrants Expired      
Shares Available For Grant, Outstanding, Ending Balance 3,489,250wkhs_SharesAvailableForGrantWarrantsOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
3,489,250wkhs_SharesAvailableForGrantWarrantsOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Warrants Number Of Shares [Roll Forward]    
Number of Shares, Outstanding, Beginning Balance 3,389,250us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
3,389,250us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Number of Shares, Additional stock reserved      
Number of Shares, Granted      
Number of Shares, Exercised      
Number of Shares, Forfeited      
Number of Shares, Expired      
Number of Shares, Outstanding, Ending Balance 3,389,250us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
3,389,250us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Weighted Average Exercise Price Per Share [Roll Forward]    
Weighted Average Exercise Price per Share, Beginning Balance $ 1.78wkhs_WarrantsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
$ 1.78wkhs_WarrantsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Weighted Average Exercise Price per Share, Additional stock reserved      
Weighted Average Exercise Price per Share, Granted      
Weighted Average Exercise Price per Share, Exercised      
Weighted Average Exercise Price per Share, Forfeited      
Weighted Average Exercise Price per Share, Expired      
Weighted Average Exercise Price per Share, Outstanding, Ending Balance    $ 1.78wkhs_WarrantsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Weighted Average Grant Fair Value Per Share [Roll Forward]    
Weighted Average Grant Date Fair Value per Share, Outstanding, Beginning Balance $ 0.09wkhs_WarrantsOutstandingWeightedAverageGrantFairValuePerShare
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
$ 0.09wkhs_WarrantsOutstandingWeightedAverageGrantFairValuePerShare
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Weighted Average Grant Date Fair Value per Share, Granted      
Weighted Average Grant Date Fair Value per Share, Exercised      
Weighted Average Grant Date Fair Value per Share, Forfeited      
Weighted Average Grant Date Fair Value per Share, Expired      
Weighted Average Grant Date Fair Value per Share, Ending Balance    $ 0.09wkhs_WarrantsOutstandingWeightedAverageGrantFairValuePerShare
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_TitleOfIndividualAxis
= wkhs_DirectorsAndOfficersMember
Weighted Average Remaining Exercise Term [Roll Forward]    
Weighted Average Remaining Exercise Term in Months, Beginning Balance 9 months 22 months
Weighted Average Remaining Exercise Term in Months, Ending Balance   9 months