Capital Stock (Textual) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Equity [Abstract]
Stock options exercised (shares)	40,582	4,466
Weighted average exercise price of stock options exercised (usd per share)	$ 2.45	$ 1.61
Proceeds from exercises of stock options	$ 99	$ 7