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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Internal Revenue Service (IRS)
Dec. 31, 2012
Internal Revenue Service (IRS)
Federal Net Operating Loss Carryforwards
Dec. 31, 2012
Federal and State
Dec. 31, 2012
State and Local Jurisdiction
Dec. 31, 2012
Federal
Operating Loss Carryforwards [Line Items]              
Net Operating Loss carryforward assets $ 8,521,000 $ 11,656,000     $ 8,500,000    
NOL carryforward assets expiration date     2029     2019  
Alternative Minimum tax credit carryforwards 1,538,000 1,366,000          
Operating Loss Refunds       $ 2,000,000      
Tax examination description             The Company remains subject to examination by Federal, Maine, Massachusetts, and New Hampshire tax authorities for the tax periods ended December 31, 2009; December 31, 2010; and December 31, 2011.