Quarterly report pursuant to Section 13 or 15(d)

Debt (Details Textual)

v3.10.0.1
Debt (Details Textual)
6 Months Ended 9 Months Ended 12 Months Ended
Jan. 12, 2018
USD ($)
shares
Jul. 14, 2017
shares
Jun. 30, 2018
Sep. 30, 2018
USD ($)
Dec. 31, 2016
USD ($)
May 01, 2018
USD ($)
Mar. 21, 2018
USD ($)
Dec. 31, 2017
USD ($)
Amount Requied To Remit Due to Excess Cash Flow           $ 1,200,000    
Stock Repurchased During Period, Shares | shares   120,000            
Debt Instrument, Maturity Date, Description       Loans under the Credit Agreement bear interest, at the Borrower’s option, at either Adjusted LIBOR (“Eurodollar”) or a Base Rate, in each case, plus an applicable margin. With respect to the Bridge Term Loan, from January 12, 2018 to, but excluding, July 12, 2018 (the six-month anniversary of the loan), the applicable margin with respect to any Base Rate loans was 4.00% per annum and with respect to any Eurodollar loan was 5.00% per annum. From July 12, 2018 to, but excluding, the 12-month anniversary thereof, the applicable margin with respect to any Base Rate loan will be 4.50% per annum and with respect to any Eurodollar loan will be 5.50% per annum. From the 12-month anniversary of January 12, 2018 and all times thereafter, the applicable margin with respect to any Base Rate loan will be 5.00% per annum and with respect to a Eurodollar loan will be 6.00% per annum.        
Debt Instrument, Repurchased Face Amount $ 10,000,000              
Dividends Payable 900,000              
Long-term Debt       $ 39,599,000       $ 27,123,000
Maximum senior leverage ratio     2.75          
Minimum Fixed charge coverage ratio     1.25          
Increase in net worth, Percentage     25.00%          
Senior leverage ratio     2.75 4.33        
Minimum Net Worth Required for Compliance       $ 8,000,000        
Minimum Fixed Charge Ratio Actual Ratio       0.49        
Line of Credit Facility, Remaining Borrowing Capacity       $ 23,600,000        
Minimum [Member]                
Debt Instrument, Interest Rate, Stated Percentage       4.95%        
Maximum [Member]                
Debt Instrument, Interest Rate, Stated Percentage       5.39%        
Bridge Loan [Member]                
Debt Instrument, Face Amount 10,000,000              
Debt Instrument, Interest Rate, Stated Percentage       7.20%        
Debt Instrument, Periodic Payment $ 250,000              
Long-term Debt       $ 7,986,000       0
Debt, Current       8,000,000        
Revolving Credit Facility [Member]                
Line of Credit Facility, Maximum Borrowing Capacity       8,600,000        
Line of Credit Facility, Remaining Borrowing Capacity       $ 23,600,000        
Senior Credit Facility [Member]                
Debt Instrument, Maturity Date         Jul. 20, 2021      
Letter of Credit [Member]                
Long-term Debt             $ 8,000,000 $ 5,000,000
Loans Payable [Member] | Senior Credit Facility [Member]                
Debt Instrument, Periodic Payment, Principal         $ 750,000      
Senior Credit Facility Agreement [Member]                
Debt Instrument, Interest Rate, Stated Percentage       8.30%        
Senior Credit Facility Agreement [Member] | Revolving Credit Facility [Member]                
Debt Instrument, Face Amount         24,000,000      
Debt Instrument, Interest Rate, Stated Percentage       6.20%        
Senior Credit Facility Agreement [Member] | Loans Payable [Member]                
Debt Instrument, Face Amount         $ 25,000,000      
Debt Instrument, Periodic Payment, Principal       $ 900,000        
Preferred Class A [Member]                
Stock Repurchased During Period, Shares | shares 280,000