Quarterly report pursuant to Section 13 or 15(d)

Bank Loan, Lines of Credit and Loan Payable - Related Party - Additional Information (Detail)

v3.8.0.1
Bank Loan, Lines of Credit and Loan Payable - Related Party - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended
Apr. 18, 2018
Mar. 31, 2018
Dec. 31, 2017
Apr. 07, 2017
Mar. 03, 2017
Apr. 22, 2016
Apr. 21, 2016
Apr. 30, 2012
Dec. 31, 2010
Short-term Bank Loans and Notes Payable   $ 394,783 $ 510,391            
Subsequent Event [Member]                  
Debt Instrument, Maturity Date Range, Start Apr. 22, 2018                
Debt Instrument, Maturity Date Range, End Jun. 22, 2018                
ICC [Member]                  
Debt Instrument, Face Amount                 $ 4,600,000
Debt Instrument, Interest Rate, Stated Percentage   4.75% 4.50%            
Short-term Bank Loans and Notes Payable   $ 394,783 $ 510,391            
Debt Instrument, Maturity Date   Dec. 31, 2018              
APC [Member]                  
Line of Credit Facility, Expiration Date   Apr. 22, 2018              
Long-term Line of Credit   $ 5,000,000 $ 5,000,000            
Line of Credit Facility, Interest Rate Description   prime rate plus 0.125%              
APC [Member] | Standby Letters of Credit [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity         $ 305,016        
NMM Business Loan Agreement [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity       $ 20,000,000       $ 10,000,000  
Line of Credit Facility, Interest Rate at Period End   4.875% 4.675%            
Long-term Line of Credit   $ 5,000,000 $ 5,000,000            
Line of Credit Facility, Remaining Borrowing Capacity   8,300,671              
Line of Credit Facility, Guarantee Given by Related Parties   $ 1,000,000              
APC Business Loan Agreement [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity           $ 10,000,000 $ 2,000,000    
Line of Credit Facility, Interest Rate at Period End   4.875% 4.675%            
Line of Credit Facility, Remaining Borrowing Capacity   $ 9,694,984 $ 9,694,984            
Line of Credit Facility, Interest Rate Description   prime rate plus 0.125%              
Line of Credit Facility, Guarantee Given by Related Parties   $ 1,000,000              
APAACO [Member] | Standby Letters of Credit [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity         $ 6,699,329        
Line of Credit Facility, Expiration Date   Apr. 22, 2018              
Line of Credit Facility, Description   The letter of credit expires on December 31, 2018 and deemed automatically extended without amendment for additional one - year periods from the present or any future expiration date, unless notified by the institution to terminate prior to 90 days from any expiration date.