Share-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($) Grant $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Number of grants issued \| Grant	5
Stock-based compensation expense \| $	$ 102	$ 199
Options granted	17,500	86,790
Options vested	17,500	86,790
Number of forfeited options \| Grant	1
Share based compensation, restricted stock granted, value \| $	$ 125
Vested Over One Year
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Stock vesting period	1 year
Number of options vested \| Grant	1
Vested Over Three Year
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Stock vesting period	3 years
Number of options vested \| Grant	2
Grant One \| Minimum
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Fair value of options granted during the period, per option share \| $ / shares	$ 1.73	$ 1.50
Grant Two \| Maximum
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Fair value of options granted during the period, per option share \| $ / shares	$ 2.09	$ 1.93
Restricted Stock
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Share based compensation, restricted stock granted	54,796	15,500
Share based compensation, restricted stock granted, value \| $	$ 534	$ 131
Share based compensation, unvested stock granted	54,796
Unrecognized stock based compensation expense \| $	$ 392
Restricted Stock Grant One
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Share based compensation, restricted stock issued	15,000
Share based compensation, restricted stock outstanding	15,000
Restricted Stock Grant Two
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Share based compensation, restricted stock issued	15,500	15,500
Share based compensation, restricted stock outstanding	15,500	15,500
2013 Plan
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Number of shares authorized for grant	385,000
Shares available for grant	145,854
Stock-based compensation expense \| $	$ 102	$ 199
LTIP
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Share based compensation, unvested stock granted	39,796
Share based compensation, description	Of the 54,796 shares of restricted stock awarded in 2018, 15,000 shares were issued and outstanding as of December 31, 2018, while all of the 15,500 shares of restricted stock awarded in 2017 were issued and outstanding as of December 31, 2018 and 2017. The remaining 39,796 shares of restricted stock in 2018 were awarded pursuant to the Company’s long-term incentive plan (“LTIP”), which covers certain officers of the Company. One half of the LTIP restricted shares granted vest on a straight-line basis over a three-year period (“LTIP Time-based Shares”), while the other half vests at the end of a three-year period contingent on the Company’s achievement of financial goals (“LTIP Performance-based Shares”).
LTIP \| Performance-based Shares
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Stock vesting period	3 years
LTIP \| Time-based Shares
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Stock vesting period	3 years

Number of forfeited options.

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Number of grants issued.

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Number of options vested.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options issued in period.

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Share based compensation arrangement by share based payment award equity instruments other than options outstanding in period.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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-Publisher FASB
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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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 maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options vested.

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Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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