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Share-Based Compensation - Additional Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  | 1 Months Ended |  | 1 Months Ended
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Mar. 31, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Jul. 08, 2013 | Jun. 30, 2013 | Mar. 12, 2013 | Dec. 31, 2012 | Apr. 30, 2013 Restricted Stock [Member] | Jul. 31, 2013 Vice President and Chief Operating Officer [Member] | Mar. 31, 2013 Vice President and Chief Operating Officer [Member] | Jul. 31, 2013 Stock Option [Member] | Apr. 30, 2013 Chief Executive Officer [Member] Restricted Stock [Member] | Apr. 30, 2013 Chief Operating Officer [Member] Restricted Stock [Member] | Apr. 30, 2013 Chief Administrative Officer [Member] Restricted Stock [Member] | Aug. 31, 2013 Chief Financial Officer [Member] | Aug. 08, 2013 Chief Financial Officer [Member] October One Two Thousand Fourteen [Member] | Aug. 08, 2013 Chief Financial Officer [Member] October One Two Thousand Fifteen [Member] | Aug. 31, 2013 Chief Financial Officer [Member] Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option Exercise Price |  |  |  | $ 7.33 |  | $ 4.51 |  |  |  |  |  |  |  |  |  |  |  |
Option Granted |  | 830 | 1,515 |  |  |  |  |  | 300 | 100 |  |  |  |  |  |  |  |
Expiration date of option | Mar. 12, 2018 |  |  |  |  |  |  |  | Jul. 08, 2018 |  |  |  |  |  |  |  |  |
Vest and non-vested shares over service period |  |  |  |  |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |
Option expiration one year from grant date |  |  |  |  |  |  |  |  | The options have an exercise price of $7.33, expire on July 8, 2018 and vest over three years as follows one third on the one (1) year anniversary of the date of grant, one third on the two (2) year anniversary of the date of grant and one third on the three (3) year anniversary of the date of grant. | The options have an exercise price of $4.51, expire on March 12, 2018 and vest over three years as follows one third on the one (1) year anniversary of the date of grant, one third on the two (2) year anniversary of the date of grant and one third on the three (3) year anniversary of the date of grant |  |  |  |  | Stock vests cumulatively as follows 75 thousand shares on October 1, 2014 and 75,000 thousand shares on October 1, 2015 |  |  |
Shares of restricted Common Stock |  | 150 | 1,000 |  |  |  |  |  |  |  |  | 500 | 250 | 100 |  |  |  | 150
Cumulated Stock vests |  |  |  |  |  |  |  | Apr. 07, 2014 |  |  |  |  |  |  |  |  |  |
Shares of restricted Common Stock non-vested |  | 1,600 | 1,600 |  | 1,450 |  | 1,152 |  |  |  |  |  |  |  |  | 75 | 75 |

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date. + 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)(1) -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 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. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Date the equity-based award expires, in CCYY-MM-DD format. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Share based compensation arrangement by share based payment award award vesting date. + References No definition available. + Details
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