Quarterly report pursuant to Section 13 or 15(d)

Line of Credit (Narrative) (Details)

v3.7.0.1
Line of Credit (Narrative) (Details) - BMO Harris Bank (The Credit Agreement) [Member] - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2017
Sep. 30, 2016
Dec. 29, 2015
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity     $ 10
Commitment fee 0.10%    
Line of credit facility, amount outstanding $ 0 $ 0  
Pledge percentage 65.00%    
London Interbank Offered Rate (LIBOR) [Member]      
Line of Credit Facility [Line Items]      
Debt instrument, basis spread on variable rate 2.25%