Stock-Based Compensation - Stock Option Activity (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of year (in shares)	1,358,717	1,223,159
Granted (in shares)	49,500	340,000
Forfeited or expired (in shares)	(229,018)	(204,442)
Exercised (in shares)	0	0
Outstanding, end of year (in shares)	1,179,199	1,358,717
Exercisable, end of year (in shares)	896,101	629,043
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of year, Weighted Average Exercise Price (usd per share)	$ 2.81	$ 3.74
Granted, Weighted Average Exercise Price (usd per share)	$ 0.56	$ 2.83
Forfeited or expired, Weighted Average Exercise Price (usd per share)	$ 3.09	$ 6.61
Exercised, Weighted Average Exercise Price (usd per share)	$ 0.00	$ 0.00
Outstanding, end of year, Weighted Average Exercise Price (usd per share)	$ 2.66	$ 2.81
Exercisable, end of year, Weighted Average Exercise Price (usd per share)	$ 2.79	$ 3.03

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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