Stock-based compensation (Tables)

6 Months Ended

Jun. 30, 2015

	Number of shares available for grant			Total options outstanding			Weighted Average Exercise Price		Aggregate Intrinsic Value
Balance at December 31, 2014		32,863			19,600		$	0.10	$	20,384
Increase in authorized options		50,000
Exercised		-			(162	)		0.12		164
Granted		(4,020	)		4,020			1.10
Cancelled		44			(44	)		0.11
Balance at June 30, 2015		78,887			23,414		$	0.27	$	20,675