Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Parenthetical) (Detail) - Notes payable to banks [Member]
 3 Months Ended
Mar. 31, 2016
USD ($)
Modified loan agreement [Member]  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable $ 121,300
Variable interest rate of note payable 2.43%
Balloon payment required under note payable $ 62,843,000
Due date for note payable 2020-08
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