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Short-Term Borrowings
3 Months Ended
Mar. 31, 2017
Short-term Debt [Abstract]  
Short-term Debt [Text Block]
10.
Short-Term Borrowings
 
At March 31, 2017, the Company had a $60 million unsecured revolving line of credit with a bank expiring November 3, 2017. The line of credit bears interest at LIBOR plus 0.75%. At March 31, 2017, the Company had no amounts outstanding on the line of credit. The highest balance on the line of credit during the quarter was $4.3 million.