Quarterly report pursuant to Section 13 or 15(d)

Reconciliation and Income Statement Classification of Gains and Losses for All Assets and Liabilities (Detail)

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Reconciliation and Income Statement Classification of Gains and Losses for All Assets and Liabilities (Detail) (USD $)
 9 Months Ended
Sep. 30, 2012
Municipal Bonds-Tax Exempt [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Purchases Issuances, Sales and Settlement, Servicing Assets $ 698,000 [1]
Realized Gains or Losses In Earnings, Servicing Assets    [1]
Unrealized Gains or Losses In Other Comprehensive Income, Servicing Assets 90,000 [1]
Ending Balance as of September 30, 2012, Servicing Assets 788,000 [1]
Stock Warrants [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Beginning Balance as of January 1,2012, Servicing Liabilities 883,000 [2]
Purchases Issuances, Sales Settlements, Servicing Liabilities    [2]
Realized Gains or Losses In Earnings, Servicing Liabilities 177,000 [2]
Unrealized Gains or Losses In Other Comprehensive Income, Servicing Liabilities    [2]
Ending Balance as of September 30, 2012, Servicing Liabilities $ 1,060,000 [2]
[1] Reflects a zero coupon tax credit municipal bond that was previously classified as a held-to-maturity security, which was reclassified as an available-for-sale security during the three months ended September 30, 2012. As the Company was not able to obtain a price from independent external pricing service providers, the discounted cash flow method was used to determine its fair value. The bond carried a par value of $700,000 and an amortized value of $698,000 with a remaining life of 2.5 years at September 30, 2012.
[2] Reflects warrants for our common stock issued in connection with services it provided to us as a placement agent in connection with our best efforts public offering and as our financial adviser in connection with our completed rights offering. The warrants were immediately exercisable when issued at an exercise price of $9.60 per share of our common stock and expire on October 14, 2015. See "Note 8 - Stockholders' Equity" for more details.