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Equity Transactions - Additional Information (Detail) - USD ($) |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 07, 2018 | May 03, 2018 | Apr. 19, 2018 | Mar. 06, 2018 | Sep. 29, 2017 | Sep. 06, 2016 | Dec. 31, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Repayment of short and long-term debt obligations | $ 3,200,000 |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, issued and sold to investors |  |  |  |  |  |  |  | 9,267,000
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, conversion price per share |  |  |  |  | $ 1.14 |  |  |
Convertible preferred stock, terms of conversion |  |  |  |  |  |  | In the event that the trading price of the Company’s Common Stock for 20 consecutive trading days (as determined in the Certificate of Designation) exceeds 400% of the then effective Conversion Price of the Series B Preferred Stock (initially set at $1.14), the Company may force conversion of the Series B Preferred Stock into shares of Common Stock or elect to redeem the Series B Preferred Stock for cash. |
Preferred stock threshold consecutive trading days |  |  |  |  | 20 days |  |  |
Trading price of common stock exceeds conversion price, percentage |  |  |  |  | 400.00% |  |  |
Convertible preferred stock, right to increase in dividend percentage upon stock price trigger |  |  |  |  | 12.00% |  |  |
Series B Preferred Stock [Member] | Smith Warrant [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, shares converted into common stock |  |  |  |  | 2,750 |  |  |
Series B Preferred Stock [Member] | Andrew Arno [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, shares converted into common stock |  |  |  |  | 50 |  |  |
Offering [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Gross proceeds from issuance of preferred stock |  |  |  |  | $ 2,700,000 |  |  |
Net proceeds from issuance of preferred stock |  |  |  |  | 2,500,000 |  |  |
Preferred stock liquidation damage payments |  |  | $ 48,000 |  |  |  |  |
Offering [Member] | Smith Warrant [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  |  | 2,800,000 |  |  |
Offering [Member] | Andrew Arno [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  |  | $ 100,000 |  |  |
Offering [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, issued and sold to investors |  |  |  |  | 5,500 |  |  |
Preferred stock, dividend rate |  |  |  |  | 10.00% |  |  |
Preferred stock, price per share |  |  |  |  | $ 1,000 |  |  |
Preferred stock, issued and sold to investors, purchase price |  |  |  |  | $ 5,500,000 |  |  |
Preferred stock, conversion price per share |  |  |  |  | $ 1.14 |  |  |
Preferred stock, shares converted into common stock |  |  |  |  | 4,824,562 |  |  |
Preferred stock, dividend payment terms |  |  |  |  |  |  | The holders of Series B Preferred Stock were entitled to receive cumulative dividends out of funds legally available thereof at a rate of ten percent (10%) per annum, payable (i) when and as declared by the Board of Directors, in quarterly installments on March 1, June 1, September 1 and December 1, (ii) upon conversion into Common Stock with respect the Series B Preferred Stock being converted, and (iii) upon redemption of the Series B Preferred Stock by the Company. |
March 2018 Offering [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Gross proceeds before deducting transaction fees and other expenses |  |  |  | $ 5,000,000 |  |  |  |
Cash proceeds from issuance of common stock, net of offering costs |  |  |  | $ 4,500,000 |  |  |  |
March 2018 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, issued and sold to investors |  |  |  | 2,857,144 |  |  |  |
Common stock, price per share |  |  |  | $ 1.75 |  |  |  |
Common stock exercise price |  |  |  | 2.17 |  |  |  |
March 2018 Offering [Member] | Warrant [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Triggering event charges |  |  |  |  |  | $ 11,000 |  |
March 2018 Offering [Member] | Unterberg Koller Capital Fund L P [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock exercise price |  |  |  |  |  | $ 2.14 |  |
March 2018 Offering [Member] | Unterberg Koller Capital Fund L P [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock exercise price |  |  |  |  |  | $ 2.07 |  |
Chardan Capital Markets, LLC [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock exercise price |  |  |  | $ 2.365 |  |  |  |
Percentage of gross proceeds of offering | 6.00% | 7.00% |  | 8.00% |  |  |  |
Percentage of warrants to purchase shares of common stock on number of shares sold |  |  |  | 3.00% |  |  |  |
Warrants term |  |  |  | 5 years 6 months |  |  |  |
May 2018 Offering [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Gross proceeds before deducting transaction fees and other expenses |  | $ 7,000,000 |  |  |  |  |  |
Cash proceeds from issuance of common stock, net of offering costs |  | $ 6,300,000 |  |  |  |  |  |
May 2018 Offering [Member] | Roth Capital Partners, LLC [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Percentage of gross proceeds of offering |  | 2.00% |  |  |  |  |  |
May 2018 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, issued and sold to investors |  | 3,170,000 |  |  |  |  |  |
Common stock, price per share |  | $ 2.21 |  |  |  |  |  |
Common stock exercise price |  | $ 2.11 |  |  |  |  |  |
November 2018 Offering [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Gross proceeds before deducting transaction fees and other expenses | $ 7,500,000 |  |  |  |  |  |  |
Cash proceeds from issuance of common stock, net of offering costs | $ 6,900,000 |  |  |  |  |  |  |
November 2018 Offering [Member] | Roth Capital Partners, LLC [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Percentage of gross proceeds of offering | 2.00% |  |  |  |  |  |  |
November 2018 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, issued and sold to investors | 3,239,785 |  |  |  |  |  |  |
Common stock, price per share | $ 2.32 |  |  |  |  |  |  |
Common stock exercise price | $ 2.20 |  |  |  |  |  |  |

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