Financial Instruments (Details Textual)	9 Months Ended
	Sep. 30, 2016
Financial Instruments (Textual) [Abstract]
Short-term investments contractual maturity period minimum	4 months
Maximum remaining maturities period of investments included in cash equivalents	3 months
Short-term investments contractual maturity period maximum	6 months
Average short-term investments maturity period	3 months