Quarterly report pursuant to Section 13 or 15(d)

Revolving credit line - Schedule of Notes Payable (Details)

v3.7.0.1
Revolving credit line - Schedule of Notes Payable (Details) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Debt Instrument [Line Items]    
Total $ 5,000,000 $ 0
Line of Credit | Revolving Credit Facility    
Debt Instrument [Line Items]    
Stated interest rate 4.75%  
Revolving credit line - 4.75 percent at June 30, 2017 (prime plus 0.5 percent), due September 29, 2018 - current portion $ 2,500,000 0
Revolving credit line - long-term portion 2,500,000 $ 0
Total $ 5,000,000  
Prime Rate | Line of Credit | Revolving Credit Facility    
Debt Instrument [Line Items]    
Basis spread on variable rate 0.50%