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Stockholders' Equity (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 31, 2016
Mar. 31, 2016
Feb. 28, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
May 31, 2015
Class of Stock [Line Items]                      
Warrants Authorized For Issuance To Acquire Common Stock Shares Number           118,959 10,500        
Common Stock, Shares Authorized       62,500,000   62,500,000          
Preferred Stock, Shares Authorized       2,000,000   2,000,000          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 10,000                    
Share-Based Compensation           $ 492,000 $ 576,000        
Proceeds From Issuance Or Sale Of Equity           $ 0 $ 16,279,000        
Stock Issued During Period, Shares, Other           60,883 210        
Shares Issued, Price Per Share       $ 2.20 $ 4.88 $ 2.20 $ 4.88        
Sale of Stock, Price Per Share       4.51   $ 4.51         $ 4.98
Underwritten Public Offering [Member]                      
Class of Stock [Line Items]                      
Stock Issued During Period, Value, New Issues     $ 17,500,000                
Other Cost and Expense, Operating     108,000                
Proceeds From Issuance Or Sale Of Equity     16,300,000                
Payment of Financing and Stock Issuance Costs     $ 1,200,000                
Stock Issued During Period Shares Underwritten Public Offering     2,990,000                
Stock Issued in Underwritten Public Offering Price Per Share     $ 5.85                
Underwriter Agent fees     $ 1,049,000                
Payments for Underwriter Agent Legal Fees     $ 55,000                
Employee Stock Option [Member]                      
Class of Stock [Line Items]                      
Warrants Authorized For Issuance To Acquire Common Stock Shares Number           118,959          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross           171,900          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term2           10 years          
Stock Granted During Period, Value, Share-Based Compensation, Gross           $ 419,000          
Allocated Share-based Compensation Expense           $ 52,000          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period1           4 years          
Stock Issued During Period, Shares, Other           60,883          
Shares Issued, Price Per Share       2.20   $ 2.20          
Sale of Stock, Price Per Share       $ 4.51   4.51          
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price           4.22          
Employee Stock Option [Member] | Minimum [Member]                      
Class of Stock [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value           4.21          
Employee Stock Option [Member] | Maximum [Member]                      
Class of Stock [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value           $ 4.85          
Consultant Plan [Member]                      
Class of Stock [Line Items]                      
Common Stock, Capital Shares Reserved for Future Issuance       116,139   116,139          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value           $ 4.85          
Shares Reserved Unissued       85,389   85,389          
Stock Option Plan Description           The Consultant Plan provides for quarterly increases in the available number of authorized shares equal to the lesser of 1% of any new shares issued by the Company during the quarter immediately prior to the adjustment date or such lesser amount as the Board of Directors shall determine.          
Share Based Compensation Arrangement by Share Based Payment Award Options Grants In Period Fair Value           $ 49,000          
Consultant Plan Expenses       $ 12,000 $ 10,000 $ 32,000 $ 10,000        
Equity Incentive Plan [Member]                      
Class of Stock [Line Items]                      
Common Stock, Shares Authorized   44,112                  
Share Based Compensation Arrangement By Share Based Payment Award Purchase Price Share Minimum           85.00%          
Common Stock, Capital Shares Reserved for Future Issuance       1,399,828   1,399,828          
Increase Decrease Of Share Based Compensation Arrangement By Share Based Payment Award Percentage           10.00%          
Share-based Compensation Outstanding - Reserved but unissued shares under the Plan       890,050   890,050   723,400      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized       $ 849,000   $ 849,000          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross           246,542   213,458      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 3.40                  
Share-Based Compensation       $ 199,000 $ 259,000 $ 604,000 $ 676,000        
Shares Reserved Unissued       263,236   263,236          
Selling, General and Administrative Expense, Total       $ 37,000   $ 112,000          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           2 years 3 months 18 days          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number       522,120   522,120   257,391      
Share Based Compensation Arrangement by Share Based Payment Award Options Grants In Period Fair Value   $ 150,000                  
Equity Incentive Plan [Member] | Scenario, Forecast [Member]                      
Class of Stock [Line Items]                      
Selling General And Admininstrative Expense To Be Recognized                   $ 38,000  
Equity Incentive Plan [Member] | Employee Stock Option [Member]                      
Class of Stock [Line Items]                      
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Subject To Repurchase Rights Decline           1,668     7,504    
Investment Options, Exercise Price                 $ 4.88