Stock Options and Stock Grants - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 181,000	$ 195,000
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted	$ 204,000
Weighted-average period over which unrecognized compensation is expected to be recognized	1 year 8 months 12 days
Vesting period of shares	3 years	3 years
Contractual life	10 years	10 years
Estimated forfeitures	4.00%	4.00%
Dividend yield	0.00%	0.00%
Closing stock price	$ 0.40
Intrinsic value of stock options exercised, total	$ 10,000	$ 4,000
Proceeds from exercise of stock options	$ 26,000	$ 10,000
Stock option exercises, Shares	69,000	35,000
Tax benefits from stock options	$ 0	$ 0
Common stock, shares outstanding	28,585,496	28,516,163
Stock Appreciation Rights (SARs) [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of the liability	$ 1,000	$ 1,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding	0	0
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding	0	0

Common Stock Closing Price

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Forfeiture Rate

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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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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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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