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Short-Term Borrowings
6 Months Ended
Jun. 30, 2018
Short-term Debt [Abstract]  
Short-term Debt [Text Block]
11.
Short-Term Borrowings
 
At June 30, 2018, the Company had a $60 million unsecured revolving line of credit with a bank expiring November 4, 2018. The line of credit bears interest at the London Interbank Offered Rate (“LIBOR”) plus 0.75%. At June 30, 2018, there were no amounts outstanding on the line of credit. There were also no amounts outstanding on the line of credit to date in 2018.