Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facility (Details)

v3.19.1
Revolving Credit Facility (Details) - Revolving credit agreement - USD ($)
Jul. 11, 2017
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Long-term debt        
Maximum borrowing capacity $ 25,000,000      
Annual commitment fee 0.20%      
Long-term debt less current installments   $ 0   $ 0
LIBOR        
Long-term debt        
Margin on variable rate 1.25%      
Effective interest rate   3.74% 3.73%