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Stock and Stock-based Compensation - Additional Information (Detail) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |  |  | 12 Months Ended | 1 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Director | Dec. 31, 2012 Director | Dec. 31, 2013 Minimum Director | Dec. 31, 2013 Maximum Director | Feb. 28, 2014 Subsequent Event | Dec. 31, 2013 Restricted Stock Units (RSUs) | Dec. 31, 2012 Restricted Stock Units (RSUs) | May 31, 2010 Restricted Stock Units (RSUs) | Jun. 30, 2012 Maximum Restricted Stock Units (RSUs) | May 31, 2010 Maximum Restricted Stock Units (RSUs) | Dec. 31, 2013 Restricted Stock Units (RSUs) | Dec. 31, 2012 Restricted Stock Units (RSUs) | Dec. 31, 2013 Restricted Stock Units (RSUs) General and Administrative Expense | Dec. 31, 2012 Restricted Stock Units (RSUs) General and Administrative Expense | Feb. 28, 2014 Restricted Stock Units (RSUs) Subsequent Event | Dec. 31, 2013 Stock Options General and Administrative Expense | Dec. 31, 2012 Stock Options General and Administrative Expense | Dec. 31, 2013 Board of Directors Compensation General and Administrative Expense Director | Dec. 31, 2012 Board of Directors Compensation General and Administrative Expense Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted restricted stock unit |  |  |  |  |  |  | 168,000 | 235,000 | 285,000 |  |  |  | 234,525 | 283,998 |  |  | 150,000 |  |  |  |
Shares available for issuance under the plan |  |  |  |  |  |  |  |  |  | 300,000 | 1,100,000 | 800,000 |  |  |  |  |  |  |  |  |
Conversion of stock RSU to Common, ratio |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Convert to common stock |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 818,000 | $ 342,000 |  | $ 20,000 | $ 16,000 | $ 32,000 | $ 27,000
Additional compensation cost that will be recognized in future periods | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average period additional compensation cost will be expensed |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |
Unrecognized compensation cost related to stock option | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of retainer fee to acquire common stock |  |  |  |  | 50.00% | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock and Stock Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Stock Purchase Plan, Stock issued | 4,697 | 4,839 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options issued | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock units acquired by directors deferred retainer fee |  |  | 6,000 | 6,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increment period for awards converted into common stock |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |

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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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: 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 4: 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 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 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made 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). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 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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