Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facility (Details)

v3.7.0.1
Revolving Credit Facility (Details) - Revolving credit agreement - USD ($)
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Long-term debt    
Maximum borrowing capacity $ 25,000,000  
Annual commitment fee 0.25%  
Long-term debt less current installments $ 13,300,000 $ 9,900,000
LIBOR    
Long-term debt    
Margin on variable rate 1.25%  
Effective interest rate 2.13% 1.75%