Maximum shares purchased by employees.

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- Definition

Maximum stock value of shares purchased by employees.

+ References

No definition available.

+ Details

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- Definition

Percentage of employee compensation for employee payroll deduction.

+ References

No definition available.

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- Definition

Percentage of fair market value of share.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award award expiration period.

+ References

No definition available.

+ Details

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- Definition

The total fair value at grant date of restricted shares issued during the period from an approved Stock Option/Stock Issuance Plan.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award number of additional shares authorized percentage.

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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- Definition

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.

+ References

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- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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- Definition

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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- Definition

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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- Definition

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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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-Section 02

-Paragraph 29, 30

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Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 11, 2007	Jul. 28, 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of common stock options, shares	4,000		32,000
Cash proceeds from exercise of common stock options	$ 6,000		$ 16,000
Weighted average grant-date fair value of stock options granted	$ 0.57	$ 0.63	$ 0.80
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available for issuance under plan	1,000,000
Percentage of market value	85.00%
Percentage of employee's payroll deductions limited to employee's compensation	10.00%
Maximum Stock value of shares purchased by employees if one thousand shares purchased	25,000
Maximum number of shares that employee can purchase each period	1,000
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash payment of income taxes related to grants included in share-based compensation	200,000	400,000	400,000
Restricted stock [Member] \| Board of Directors non-employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	12 months
Restricted stock shares granted	50,000
Value of restricted stock granted	100,000
Restricted stock [Member] \| Key officers and employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	48 months
Restricted stock shares granted	1,600,000
Value of restricted stock granted	2,800,000
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of common stock options, shares	4,000
Cash proceeds from exercise of common stock options	6,000
Unrecognized compensation costs related to non-vested awards granted	$ 3,300,000
1995 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
1995 Stock option expiry date	May 24, 2005
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	4 years
Stock option expiration period	10 years
Additional shares authorized, percent	2.50%
Number of additional shares authorized	750,000
Number of shares available for future grants	1,600,000
2005 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	48 months
2005 Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available for issuance under plan				7,000,000	5,000,000
2005 Plan [Member] \| Restricted stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	12 months