Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2021

Equity Incentive Plans [Abstract]

Stock Option Plan Activity

Activity under the stock option plans was as follows:

	Number of Options			Weighted Average Exercise Price
Balances at December 31, 2020		743,627		$	3.60
Granted		—			—
Exercised		(40,253	)		2.79
Cancelled		(7,211	)		7.07
Balances at September 30, 2021		696,163		$	3.58

Options Outstanding and Vested and Currently Exercisable by Exercise Prices

The options outstanding and vested and currently exercisable by exercise prices as of September 30, 2021 were as follows:

	Option outstanding					Options vested and exercisable
	Exercise price	Outstanding (in shares)		Weighted average remaining life years		Number of options vested		Exercise price		Weighted average remaining life years
$	1.71		227,780		4.46		116,669	$	1.71		4.46
	3.24		284,282		5.75		284,282		3.24		5.75
	3.96		67,422		6.46		54,645		3.96		6.45
	4.50		1,667		7.12		834		4.50		7.12
	4.95		44,445		7.49		22,223		4.95		7.49
	6.12		58,342		8.20		17,091		6.12		8.20
	27.00		12,225		0.82		12,225		27.00		0.82
			696,163		5.63		507,969				5.57