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Nature of the Business and Operations (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 13, 2015
Aug. 31, 2016
Jun. 30, 2014
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Nature of the Business and Operations (Textual)                                    
Net loss (including noncontrolling interests)       $ (431,000) $ (2,162,000) $ (1,331,000) $ (1,367,000) $ (2,588,000) $ (1,368,000) $ (1,792,000) $ (2,072,000) $ (3,107,000) $ (3,245,000) $ (3,874,000) $ (4,008,000) $ (5,291,000) $ (7,820,000) $ (14,234,000)
Accumulated deficit       $ (179,040,000)       $ (173,749,000)               (179,040,000) (173,749,000)  
Net cash used in operating activities                               (6,252,000) (8,063,000) (11,824,000)
Issuance of common stock 3,200,000                                  
Net proceeds from issuance of common stock                               $ 7,913,000 $ 5,422,000 $ 9,253,000
Shares price per share                       $ 4.00           $ 4.00
Price per share $ 1.90                                  
Stock issued for cash $ 6,100,000                                  
Cash 5,400,000                                  
Direct offering cost $ 700,000                                  
Issuance of shares remaining for under our existing shelf registration statement       1,800,000                       1,800,000    
Shelf registration statement, expire date                               Jun. 12, 2017    
Aggregate of common stock offering price   $ 20,000,000 $ 20,000,000                              
Employee Investor Shares [Member]                                    
Nature of the Business and Operations (Textual)                                    
Issuance of common stock   427,352                                
Net proceeds from issuance of common stock   $ 500,000                                
Shares price per share   $ 1.17                                
Outside Investor Shares [Member]                                    
Nature of the Business and Operations (Textual)                                    
Issuance of common stock   4,600,000                                
Net proceeds from issuance of common stock   $ 4,600,000                                
Shares price per share   $ 1.00                                
Securities Purchase Agreement [Member]                                    
Nature of the Business and Operations (Textual)                                    
Issuance of common stock   8,627,352                                
Net proceeds from issuance of common stock   $ 7,900,000                                
Description of securities purchase agreement   (iii) up to 3,600,000 shares issuable upon exercise of warrants (the "Pre-Funded Warrants") by outside investors for which we received $3,564,000 pre-funded in proceeds and will receive up to $36,000 in proceeds upon future cash exercises.                                
Warrants expiration, date   Feb. 17, 2022                                
Proceeds from issuance of warrants   $ 4,800,000                                
Purchase Warrants [Member]                                    
Nature of the Business and Operations (Textual)                                    
Issuance of common stock                               4,313,676    
Shares price per share       $ 1.12                       $ 1.12    
Proceeds from issuance of warrants   $ 4,800,000