Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Stock-Based Compensation

Summary of Stock Option Activity

		Options Outstanding
			Weighted-		Weighted-
			Average		Average
	Options		Exercise		Remaining	Aggregate
	Available for	Number of	Price Per		Contractual	Intrinsic
	Grant	Options	Share		Life (years)	Value
						(In thousands)
Balance—December 31, 2017	83,929	1,593,195	$	8.88	6.6	$	1,997
Prior period adjustment	(1,026)	13,784		4.54
Options authorized	1,084,516	—		—
RSUs granted	(60,450)	—		—
RSUs cancelled/forfeited	1,900	—		—
Options granted	(310,715)	310,715		8.79
Options exercised	—	(190,800)		4.69		$	815
Options cancelled/forfeited	28,834	(30,707)		7.97
Balance—June 30, 2018	826,988	1,696,187	$	7.28	7.2	$	3,204
Options exercisable—June 30, 2018		746,702	$	5.85	4.8	$	2,355

Schedule of Restricted Stock Unit Activity

	RSUs Outstanding
		Weighted-
		Average
	Number of	Grant Date
	Restricted Stock	Fair Value Per
	Units	Share
Balance—December 31, 2017	30,680	$	10.55
Granted	60,450		8.66
Cancelled/forfeited	(1,900)		8.39
Balance—June 30, 2018	89,230	$	9.32

Summary of Stock-Based Compensation Expense

The Company recognized stock-based compensation expense from awards granted to employees and non-employees under its equity incentive plans and from its ESPP as follows, excluding amounts related to GLOBALFOUNDRIES, Inc. (GF) (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Research and development	$	138	$	73	$	246	$	245
General and administrative		466		213		899		439
Sales and marketing		113		122		197		155
Total	$	717	$	408	$	1,342	$	839

Schedule of Fair Value Assumptions

	Option Plan				ESPP
	Six Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Expected volatility	51.9-53.1	%	47.2-59.3	%	59.5-  87.8	%	49.5	%
Risk-free interest rate	2.6-2.9	%	2.0-2.1	%	0.9-2.1	%	0.5	%
Expected term (in years)	5.7-6.1		5.8-6.1		0.5-1.0		0.5
Dividend yield	—	%	—	%	—	%	—	%