XML 40 R40.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Long-Term Debt (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Sep. 24, 2019
Sep. 23, 2019
Long-Term Debt      
Maximum borrowing capacity $ 30,000,000 $ 30,000,000 $ 35,000,000
Amount outstanding under the credit facility 0    
Remaining maximum borrowing capacity $ 16,375,000    
LIBOR | Minimum      
Long-Term Debt      
Basis points (in percent) 1.25%    
LIBOR | Maximum      
Long-Term Debt      
Basis points (in percent) 1.75%