Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Prinicples (Details Textual 4)

v2.4.1.9
Summary of Significant Accounting Prinicples (Details Textual 4) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Cumulative deferred tax assets $ 9,100,000us-gaap_DeferredTaxAssetsNet  
Expected volatility rate of stock 50.00%wkhs_ExpectedVolatilityRateOfStock  
Research and development $ 847,133us-gaap_ResearchAndDevelopmentExpense $ 569,355us-gaap_ResearchAndDevelopmentExpense