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Stock-based compensation (Tables)

3 Months Ended

Mar. 31, 2016

	Number of shares available for grant		Total options outstanding			Weighted Average Exercise Price		Aggregate Intrinsic Value
Balance at December 31, 2015		29,485		43,071		$	0.48	$	9,252
Exercised		-		(20	)		0.15		(11	)
Granted		-		-			-		-
Cancelled		-		-			-		-
Balance at March 31, 2016		29,485		43,051		$	0.48	$	9,041