Stock Option Plan (Tables)

3 Months Ended

Mar. 31, 2021

The stock options outstanding and exercisable by exercise price at March 31, 2022 are as follows:

		Options Outstanding						Options Vested and Exercisable
Exercise Price		Number Outstanding		Weighted- Average Remaining Contractual Life (Years)		Weighted- Average Exercise Price		Number Exercisable		Weighted- Average Exercise Price
$	0.16		11,950		1.8	$	0.16		11,950	$	0.16
	0.37		23,050		3.2		0.37		23,050		0.37
	0.97		29,300		3.9		0.97		29,300		0.97
	2.51		58,780		4.4		2.51		58,780		2.51
	2.89		43,000		4.9		2.89		43,000		2.89
	2.93		255,422		5.2		2.93		250,606		2.93
	3.18		83,057		5.3		3.18		75,222		3.18
			504,559						491,908

The Company’s restricted stock units activity is summarized as follows:

	Units Issued and Outstanding			Weighted-Average Grant Date Fair Value
As of December 31, 2021		474,450		$	9.28
Granted		15,000			11.98
Released		(26,319	)		8.44
Canceled		(20,656	)		11.92
As of March 31, 2022		442,475			9.29

The Company’s stock award activity under the stock incentive plan is summarized as follows:

The Company’s stock option activity under the stock incentive plan is summarized as follows:

	Options Issued and Outstanding			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value (in thousands)
As of December 31, 2021		584,243		$	2.51		5.0	$	7,438
Granted		—			—		—		—
Exercised (1)		(79,517	)		1.79		—		—
Canceled		(167	)		2.93		—		—
As of March 31, 2022		504,559			2.62		4.9		3,746
Options vested and expected to vest as of March 31, 2022		504,559			2.62		4.9		3,746
Options vested and exercisable as of March 31, 2022		491,908			2.61		4.8		3,658

(1) Includes vesting of early-exercised options.