Acquisitions (Tables)

12 Months Ended

Dec. 31, 2016

Acquisitions

Schedule of allocation of the purchase price based on the estimated fair values of the assets acquired and liabilities

Developed technology	$	10,100
Trade name		220
Goodwill		80
Total assets acquired	$	10,400

Business Acquisition, Pro Forma Information [Table Text Block]

	Year Ended
	December 31,
	2016		2015		2014
Revenue	$	94,101	$	70,076	$	55,429
Net loss		(7,305)		(4,335)		(4,535)
Net loss per share attributable to common stockholders, basic		(0.54)		(2.39)		(1.47)
Net loss per share attributable to common stockholders, diluted		(0.60)		(2.39)		(1.47)