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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified |  |  | 9 Months Ended | 12 Months Ended
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Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2013 Federal | Jun. 30, 2013 New York | Jun. 30, 2013 Connecticut | Jun. 30, 2013 Pennsylvania | Jun. 30, 2013 New Jersey | Dec. 31, 2012 Minimum | Dec. 31, 2012 Maximum
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |
Net operating loss carryforward |  | $ 10.6 |  |  |  |  |  |  |
Annual limitation of federal NOLs |  |  |  |  |  |  |  | 1.0 | 2.2
Expiration date of net operating loss carryforward |  |  |  |  |  |  |  | 2018 | 2024
Unrecognized income tax benefit | $ 0.8 |  |  |  |  |  |  |  |
Number of years for examination |  |  | Four | Four | Four | Four | Five |  |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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