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Stock Based Compensation (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 4 years |  |  |  |  |
Stock options outstanding (in shares) | 1,954,000 | [1] | 2,614,500 | [2] | 1,954,000 | [1] | 2,614,500 | [2] | 2,644,000 | 3,039,833
Outstanding and fully vested stock options (in shares) | 1,754,000 | [1] | 2,064,500 | [2] | 1,754,000 | [1] | 2,064,500 | [2] |  |
Weighted average exercise price (in dollars per share) | $ 2.00 | [1] | $ 1.99 | [2] | $ 2.00 | [1] | $ 1.99 | [2] | $ 1.96 | $ 1.98
Compensation expense | $ 3,000 |  | $ 34,000 |  | $ 54,000 |  | $ 98,000 |  |  |
Reduction from forfeiture of a non-qualified stock option |  |  |  |  | 23,000 |  |  |  |  |
Term period of option granted |  |  |  |  | 10 years |  |  |  |  |
Number of shares authorized for purchase (in shares) | 250,000 |  |  |  | 250,000 |  |  |  |  |
Common stock per share (in dollars per share) | $ 1.35 |  |  |  | $ 1.35 |  |  |  |  |
Percentage of yearly vesting on purchase shares (in hundredths) |  |  |  |  | 25.00% |  |  |  |  |
Total unrecognized compensation cost related to unvested options | 94,000 |  |  |  | 94,000 |  |  |  |  |
Unrecognized compensation cost to be recognized in 2013 | 44,000 |  |  |  | 44,000 |  |  |  |  |
Unrecognized compensation cost to be recognized in 2014 | 50,000 |  |  |  | 50,000 |  |  |  |  |
Contractual Term With One-third Yearly Vesting [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual term |  |  |  |  | 6 years |  |  |  |  |
Proportional vesting number of shares (in hundredths) |  |  |  |  | 33.33% |  |  |  |  |
Vesting period |  |  |  |  | 3 years |  |  |  |  |
Employee Stock Option [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock options outstanding (in shares) | 1,138,000 |  |  |  | 1,138,000 |  |  |  |  |
Outstanding and fully vested stock options (in shares) | 938,000 |  |  |  | 938,000 |  |  |  |  |
Weighted average exercise price (in dollars per share) | $ 2.05 |  |  |  | $ 2.05 |  |  |  |  |
Remaining weighted contractual life |  |  |  |  | 1 year 6 months |  |  |  |  |
Compensation expense | 3,000 |  | 34,000 |  | 36,000 |  | 72,000 |  |  |
Employee Stock Option [Member] | Contractual Term With One-fifth Yearly Vesting [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual term |  |  |  |  | 10 years |  |  |  |  |
Proportional vesting number of shares (in hundredths) |  |  |  |  | 20.00% |  |  |  |  |
Vesting period |  |  |  |  | 5 years |  |  |  |  |
Director Stock Options [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual term |  |  |  |  | 10 years |  |  |  |  |
Vesting period |  |  |  |  | 6 months |  |  |  |  |
Stock options outstanding (in shares) | 816,000 |  |  |  | 816,000 |  |  |  |  |
Outstanding and fully vested stock options (in shares) | 816,000 |  |  |  | 816,000 |  |  |  |  |
Weighted average exercise price (in dollars per share) | $ 2.04 |  |  |  | $ 2.04 |  |  |  |  |
Remaining weighted contractual life |  |  |  |  | 4 years 6 months |  |  |  |  |
Compensation expense | $ 0 |  | $ 0 |  | $ 18,000 |  | $ 26,000 |  |  |
[1] | Options with exercise prices ranging from $1.10 to $2.95
[2] | Options with exercise prices ranging from $1.41 to $2.95

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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