Significant Customers (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Sales Revenue, Net [Member]
Concentration Risk, Benchmark	one customer that exceeded 10% of revenue	one customer that exceeded 10% of revenue	one customer that exceeded 10% of revenue	one customer that exceeded 10% of revenue
Accounts Receivable [Member]
Concentration Risk, Benchmark			one customer that exceeded 10% of the total accounts receivable		one customer that exceeded 10% of the total accounts receivable