Stock-Based Compensation - Restricted Stock Activity (Details) (USD $)	3 Months Ended	12 Months Ended
Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number		176,468	34,880	112,148	337,039
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, weighted average grant date fair value		$ 0.68	$ 3.44	$ 1.07	$ 1.55
Stock issued during period, shares, restricted stock award, net of forfeitures	65,218	176,468	34,880	112,148
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value		$ 0.68	$ 3.44	$ 1.07
Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, exercisable, number		(34,880)	(112,148)	(290,109)
Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding, weighted average exercise price		$ 0.68	$ 3.44	$ 1.07
Repurchase of company stock, shares	(56,234)	0	0	(46,930)
Share-based compensation arrangement by share-based payment award, equity instruments other than options, forfeitures, weighted average grant date fair value		$ 0.00	$ 0.00	$ 3.92
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized		$ 37,440
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, total fair value		$ 0	$ 200,000	$ 100,000

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued 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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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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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Number of shares related to Restricted Stock Award forfeited during the period.

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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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