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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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