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Stockholder's Equity - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Stockholders' Equity Note [Line Items] | |||
| Common stock available for issuance | 6,915,000 | ||
| Options outstanding, Shares | 7,131,000 | 9,036,000 | 7,365,000 |
| Stock-based compensation expense | $ 73,000 | $ 131,000 | $ 128,000 |
| Unrecognized stock-based compensation expense | $ 97,000 | $ 115,000 | |
| Unrecognized stock-based compensation, Recognition period | 5 years | ||
| Granted to independent agent and employees | 150,000 | 3,425,000 | |
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Independent Sales Agents
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| Stockholders' Equity Note [Line Items] | |||
| Granted to independent agent and employees | 2,513,000 | ||
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Seven Stock Option Plans
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| Stockholders' Equity Note [Line Items] | |||
| Common stock available for issuance | 18,850,000 | ||
| X | ||||||||||
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- Details
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
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- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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