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Subsequent Events - Additional Information (Detail) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
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Nov. 06, 2017 USD ($) $ / shares shares | Oct. 11, 2017 USD ($) Conversion $ / shares | Oct. 10, 2017 USD ($) Investor d $ / shares shares | Sep. 21, 2017 USD ($) shares | Aug. 28, 2017 USD ($) | Aug. 04, 2017 USD ($) $ / shares | Jul. 07, 2017 USD ($) $ / shares | May 09, 2017 USD ($) $ / shares | Apr. 10, 2017 USD ($) $ / shares | Mar. 13, 2017 USD ($) $ / shares | Mar. 02, 2017 USD ($) $ / shares | Feb. 13, 2017 $ / shares | Feb. 10, 2017 USD ($) $ / shares | Feb. 01, 2017 USD ($) $ / shares | Jan. 12, 2017 USD ($) $ / shares | Jul. 21, 2016 $ / shares shares | Mar. 28, 2017 USD ($) shares | Sep. 30, 2017 USD ($) $ / shares | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 $ / shares
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Closing bid price per NASDAQ listing notification letter | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 1.00 |  |  |  |  |  |  |  |  |
Stock market granted additional calendar days |  |  |  |  |  |  |  |  |  |  |  | 180 days |  |  |  |  |  |  |  |  |
Stock market granted consecutive trading days preceding the date of notice |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |
Consecutive business days for closing bid price of common stock |  |  |  |  |  |  |  |  |  |  |  | 10 days |  |  |  |  |  |  |  |  |
Conversion of convertible notes |  |  |  |  | $ 23,563,014 | $ 1,015,848 | $ 2,000,000 | $ 1,913,915 | $ 3,621,286 | $ 4,417,830 | $ 126,000 |  | $ 3,045,817 | $ 544,000 | $ 1,478,318 |  |  | $ 26,199,000 | $ 0 | $ 649,000 |
Debt instrument, conversion price | $ / shares |  |  |  |  |  | $ 24.50 | $ 17.50 | $ 17.50 | $ 21.00 | $ 38.50 | $ 49.00 |  | $ 70.00 | $ 112.00 | $ 126.00 |  |  |  |  |  |
Reverse stock split ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0625 |  |  |  |  |
Number of fractional shares were issued in connection with the reverse stock split | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.01 |  | $ 0.01 |  | $ 0.01 | $ 0.01
Senior Secured Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued to holders as payment on convertible notes payable | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,800,000 |
Series C Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued to holders as payment on convertible notes payable | shares |  |  |  | 590 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible notes |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reverse stock split ratio | 0.0029 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | OTCQB [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reverse stock split ratio | 0.0029 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fractional shares were issued in connection with the reverse stock split | shares | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Series C Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares outstanding for a cash payment | $ 590,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Master Control Account Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash previously funded from holders of notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,600,000 |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants | $ / shares |  |  | $ 122.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price description |  |  | On the 136th day subsequent to the date of consummation of the offering hereunder, there shall be a "true up" with regard to the issuance of shares upon exercise such that the difference between 382,650 shares and the number of shares that would be issuable if the exercise price were lowered to the average price per share of the variable weighted average price of our common stock for the five trading days commencing on the date which is 76 days after the date of consummation of the offering hereunder, but not lower than 33% of the variable weighted average price of a share of our common stock on the 81st date following the date of consummation of the offering hereunder. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] | On Or After 75th Day Subsequent To Date of Consummation of Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issuable upon warrants exercised | shares |  |  | 382,650 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] | After 76 Days from Date of Consummation of Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of trading days required to measure weighted average price of common stock | d |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] | On 81st Date Following from Date of Consummation of Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of variable weighted average price of share of common stock |  |  | 33.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] | On Or Before 135th Date Following From Date of Consummation of Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants provision may buy out |  |  | $ 6,138,349.80 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] | Senior Secured Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Notes investors entered into agreement | Investor |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible notes |  |  | $ 279,015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registration statement on Form S-1 filed date |  |  | Oct. 11, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price of debt instrument to purchase price of common stock percentage. |  | 200.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity date |  | Dec. 30, 2018 | Dec. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversions during 75 day period from date of consummation | Conversion |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption of outstanding debt instrument for cash |  | $ 7,300,000 | $ 7,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, conversion price | $ / shares |  | $ 0.05 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] | Series C Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares outstanding for a cash payment |  |  | $ 590,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock Issued [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued to holders as payment on convertible notes payable | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 109,345,554 |  |  |  |
Common Stock Issued [Member] | Amendment to Restructuring Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issuable upon warrants exercised | shares |  |  | 127,550 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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