Quarterly report pursuant to Section 13 or 15(d)

Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Parenthetical) (Detail)

v3.3.0.814
Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Parenthetical) (Detail) - Notes payable to banks [Member]
 9 Months Ended
Sep. 30, 2015
USD ($)
Modified loan agreement [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 249,600
Variable interest rate of note payable 2.19%
Balloon payment required under note payable $ 62,843,000
Due date for note payable 2020-08
Frequency of periodic payment Monthly
Master agreement one [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 338,400
Variable interest rate of note payable 3.90%
Balloon payment required under note payable $ 77,060,000
Due date for note payable 2015-10
Frequency of periodic payment Monthly
Master agreement two [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 531,400
Fixed interest rate of note payable 3.54%
Balloon payment required under note payable $ 12,635,000
Due date for note payable 2015-12
Frequency of periodic payment Monthly
Master agreement three [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 483,900
Fixed interest rate of note payable 3.19%
Balloon payment required under note payable $ 11,670,000
Due date for note payable 2016-06
Frequency of periodic payment Monthly
Equipment agreement [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 30,500
Fixed interest rate of note payable 5.24%
Due date for note payable 2019-07
Frequency of periodic payment Monthly
Master agreement four [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 95,200
Variable interest rate of note payable 11.50%
Due date for note payable 2018-04
Frequency of periodic payment Quarterly