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Limitations for issuance of common stock or voting power outstanding to holder.

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Majority outstanding shares redeemable date.

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Number of redemption price accrued and unpaid dividends installment payments.

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Preferred stock conversion price per share.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares issued for each share of convertible preferred stock that is converted.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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The amount of accretion of the preferred stock redemption discount during the period.

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No definition available.

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The percentage rate used to calculate dividend payments on preferred stock.

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Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.

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Value of preferred stock and warrants for common stock issued.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The per share liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Redeemable Convertible Preferred Stock - Additional Information (Detail)		12 Months Ended
	May 02, 2012 USD ($)	Dec. 31, 2018 USD ($) Installment $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Aug. 01, 2017 $ / shares shares	Mar. 23, 2017 $ / shares	Apr. 30, 2012 shares	Apr. 13, 2012 $ / shares shares
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares issued		1,000,000	1,000,000
Warrant exercise price per share \| $ / shares					$ 2.26
Common stock, shares issued		9,413,245	8,850,532				1,000,000
Warrants to purchase common stock		325,000
Redeemable convertible preferred stock, shares authorized		1,000,000	1,000,000
Preferred stock and warrants value issued \| $	$ 5,000,000
Warrants value \| $		$ 840,000
Accretion amount \| $		$ 60,000	$ 56,000
Common Stock \| Repricing Agreement
Temporary Equity [Line Items]
Convertible preferred stock, shares issuable upon conversion			1
Maximum \| Repricing Agreement
Temporary Equity [Line Items]
Limitations for issuance of common stock or voting power outstanding to holder, in percentage				19.99%
Warrants Exercise Price Tranche One
Temporary Equity [Line Items]
Warrant exercise price per share \| $ / shares							$ 6.00
Warrants to purchase common stock							125,000
Warrants Exercise Price Tranche Two
Temporary Equity [Line Items]
Warrant exercise price per share \| $ / shares							$ 7.00
Warrants to purchase common stock							200,000
Securities Purchase Agreement
Temporary Equity [Line Items]
Number of warrants							325,000
Series A Convertible Preferred Stock
Temporary Equity [Line Items]
Conversion price per share \| $ / shares							$ 5.00
Redeemable convertible preferred stock, shares authorized						1,000,000
Cumulative dividends at a rate		6.00%
Preferred stock value \| $	$ 4,160,000
Series A Convertible Preferred Stock \| Common Stock \| Repricing Agreement
Temporary Equity [Line Items]
Conversion price per share \| $ / shares			$ 2.26
Convertible preferred stock, shares issuable upon conversion			2,212,389
Series A Convertible Preferred Stock \| Accounts Payable and Other Accrued Expenses
Temporary Equity [Line Items]
Total accrued but unpaid dividends \| $		$ 80,000	$ 80,000
Series A Convertible Preferred Stock \| Scenario, Plan
Temporary Equity [Line Items]
Redeemable convertible preferred stock, liquidation preference per share \| $ / shares		$ 5.00
Number of redemption price, accrued and unpaid dividends installment payments \| Installment		36
Annual interest rate on redemption value payable		6.00%
Redemption price per share \| $ / shares		$ 5.00	$ 5.00
Series A Convertible Preferred Stock \| Scenario, Plan \| Maximum
Temporary Equity [Line Items]
Majority outstanding shares redeemable date		Apr. 30, 2017
Series A Convertible Preferred Stock \| Securities Purchase Agreement
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares issued							1,000,000
Warrant exercise price per share \| $ / shares							$ 5.00
Series A Warrants \| Common Stock \| Repricing Agreement
Temporary Equity [Line Items]
Warrant exercise price per share \| $ / shares				$ 2.72
Warrants to purchase common stock				125,000
Series B Warrants \| Common Stock \| Repricing Agreement
Temporary Equity [Line Items]
Warrant exercise price per share \| $ / shares				$ 3.17
Warrants to purchase common stock				200,000