Equity Transactions - Additional Information (Detail)				1 Months Ended	12 Months Ended
	Sep. 29, 2017 USD ($) $ / shares shares	May 17, 2017 USD ($) shares	May 16, 2017 Investor $ / shares shares	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) Triggering_Event $ / shares	May 31, 2017 $ / shares	Sep. 02, 2016 USD ($) $ / shares shares
Class of Stock [Line Items]
Preferred stock, issued and sold to investors, purchase price				$ 5,500,000
Gross proceeds from issuance of preferred stock				2,700,000
Debt instrument, principal amount				$ 2,800,000
Net proceeds from issuance of preferred stock					$ 2,413,000
Gross proceeds before deducting transaction fees and other expenses		$ 2,300,000
Offering cost related to the transaction		200,000
Transaction fees		100,000
Legal and other expenses		100,000
Cash from issuance of common stock, net of offering costs		$ 2,100,000
Warrants term					5 years
Warrants exercisable beginning date					Nov. 18, 2017
Number of triggering events for issuance of warrants | Triggering_Event					5
Warrants [Member]
Class of Stock [Line Items]
Triggering event charges					$ 3,000
Investors [Member] | Note and Warrant Purchase Agreement [Member]
Class of Stock [Line Items]
Common stock exercise price | $ / shares							$ 2.74
Warrants expiration period					5 years
Purchase of warrants | shares							1,700,000
Notes and warrants issuance date					Sep. 06, 2016
Investors [Member] | Note and Warrant Purchase Agreement [Member] | Senior Subordinated Notes [Member]
Class of Stock [Line Items]
Debt instrument, principal amount							$ 4,000,000
Unterberg Warrant [Member]
Class of Stock [Line Items]
Adjusted exercise price | $ / shares					$ 2.14
Smith Warrant [Member]
Class of Stock [Line Items]
Adjusted exercise price | $ / shares					2.38
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, dividend rate	10.00%
Preferred stock, conversion price per share | $ / shares	$ 1.14				$ 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%
Triggering event charges					$ 41,000
Series B Preferred Stock [Member] | Andrew Arno [Member]
Class of Stock [Line Items]
Preferred stock, shares converted into common stock | shares	50
Series B Preferred Stock [Member] | Smith Warrant [Member]
Class of Stock [Line Items]
Preferred stock, shares converted into common stock | shares	2,750
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
Offering [Member] | Andrew Arno [Member]
Class of Stock [Line Items]
Debt instrument, principal amount	100,000
Offering [Member] | Smith Warrant [Member]
Class of Stock [Line Items]
Debt instrument, principal amount	$ 2,800,000
Offering [Member] | Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, issued and sold to investors | shares	5,500
Preferred stock, dividend rate	10.00%
Preferred stock, price per share | $ / shares	$ 1,000
Preferred stock, issued and sold to investors, purchase price	$ 5,500,000
Preferred stock, conversion price per share | $ / shares	$ 1.14
Preferred stock, shares converted into common stock | shares	4,824,562
Preferred stock, dividend payment terms					The holders of Series B Preferred Stock are 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.
Private Placement [Member]
Class of Stock [Line Items]
Common stock, issued and sold to investors | shares			85,000
Common stock, price per share | $ / shares			$ 1.10
Number of accredited investors | Investor			4
Private Placement [Member] | Andrew Arno [Member]
Class of Stock [Line Items]
Common stock, issued and sold to investors | shares			50,000
Common stock, price per share | $ / shares			$ 1.10
Registered Direct Offering [Member]
Class of Stock [Line Items]
Common stock, issued and sold to investors | shares		2,077,000
Sutter [Member]
Class of Stock [Line Items]
Percentage of warrants to purchase shares of common stock on number of shares sold					5.00%
Common stock exercise price | $ / shares					$ 1.21
Common stock offering price per share | $ / shares						$ 1.10
Chardan [Member]
Class of Stock [Line Items]
Percentage of warrants to purchase shares of common stock on number of shares sold					5.00%
Common stock exercise price | $ / shares					$ 1.155
Common stock offering price per share | $ / shares						$ 1.05