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Stockholders' Equity (Details 4) - Warrant [Member]
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number Warrants Outstanding and Exercisable | shares 6,291
Warrants Outstanding and Exercisable, Weighted Avg. Exercise Price (in dollars per share) $ 5.34
Warrants Outstanding and Exercisable, Weighted Avg. Remaining Life 2 years 1 month 24 days
Range of Exercise Prices (in dollars per share) $ 5.34
Range of Exercise Prices, Lower Range Limit (in dollars per share) 4.06
Range of Exercise Prices, Upper Range Limit (in dollars per share) $ 8.19
Exercise Price Range One [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number Warrants Outstanding and Exercisable | shares 2,183
Warrants Outstanding and Exercisable, Weighted Avg. Exercise Price (in dollars per share) $ 4.06
Warrants Outstanding and Exercisable, Weighted Avg. Remaining Life 2 years
Range of Exercise Prices (in dollars per share) $ 4.06
Exercise Price Range Two [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number Warrants Outstanding and Exercisable | shares 2,519
Warrants Outstanding and Exercisable, Weighted Avg. Exercise Price (in dollars per share) $ 4.64
Warrants Outstanding and Exercisable, Weighted Avg. Remaining Life 3 years
Range of Exercise Prices (in dollars per share) $ 4.64
Exercise Price Range Three [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number Warrants Outstanding and Exercisable | shares 1,589
Warrants Outstanding and Exercisable, Weighted Avg. Exercise Price (in dollars per share) $ 8.19
Warrants Outstanding and Exercisable, Weighted Avg. Remaining Life 1 year
Range of Exercise Prices (in dollars per share) $ 8.19