Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Summary of Outstanding Warrants Issued by Company

Below is the summary of outstanding warrants issued by the Company as of September 30, 2018:

Warrant Type	Number of Shares Issuable Upon Exercise		Weighted Average Exercise Price		Issue Date	Expiration Date
2014 Consultant Warrant		85,000	$	10.70	August 13, 2014	August 13, 2019
East West Bank Warrant		40,000		3.64	February 8, 2017	February 8, 2022
VLL7 and VLL8 Warrants		580,000		2.00	February 8, 2017	February 8, 2022
2017 Consultant Warrant		60,000		4.60	February 8, 2017	February 8, 2019
Total		765,000

Summary of Activity under Stock-Based Compensation Plans

A summary of activity for the Company’s stock option plans for the nine months ended September 30, 2018 follows:

	Number Outstanding			Average Exercise Price per Share		Weighted Average Remaining Contractual Term (Years)		Average Intrinsic Value
Balance at December 31, 2017		672,441		$	6.28		—	$	—
Granted		—			—
Cancelled or Expired		(47,970	)		11.56
Exercised		(2,500	)		5.20
Balance at September 30, 2018		621,971		$	5.87		6.93	$	721,856
Vested or expected to vest at     September 30, 2018		618,324		$	5.88		6.93	$	716,020
Exercisable at September 30, 2018		510,856		$	6.20		6.77	$	544,072

Summary Information about Options Outstanding

The following table summarizes information about options outstanding as of September 30, 2018:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Exercisable		Weighted Average Exercise Price
$4.36 - $7.20		472,810		7.50	$	4.47		361,695	$	4.50
$7.50 - $11.30		127,415		5.39		9.42		127,415		9.42
$12.00 - $19.70		17,396		3.73		13.66		17,396		13.66
$21.70 - $24.20		4,350		2.93		23.27		4,350		23.27
$4.36 - $24.20		621,971		6.93	$	5.87		510,856	$	6.20

Summary of Restricted Stock Unit (RSU) Activity

The following is a summary of restricted stock unit (“RSU”) activity for the nine months ended September 30, 2018:

	Number of RSUs			Weighted Average Fair Value
Unvested at December 31, 2017		1,460,044		$	3.08
Granted		710,763			4.02
Vested		(457,345	)		3.60
Forfeited		(258,417	)		2.67
Unvested at September 30, 2018		1,455,045		$	3.45
Shares vested but not released		372,018		$	3.07

Stock-Based Compensation Expense Related to Stock Options and RSUs

The following table illustrates all employee stock-based compensation expense related to stock options and RSUs included in the condensed consolidated statements of operations for the three and nine months ended September 30, 2018 and 2017 (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Cost of revenue	$	22	$	24	$	63	$	71
Research and development		125		130		397		361
Selling and marketing		171		193		519		463
General and administrative		385		317		1,008		1,021
Total	$	703	$	664	$	1,987	$	1,916

Schedule of Common Stock Reserved for Future Issuance

Common stock reserved for future issuance as of September 30, 2018 was as follows:

Exercise of outstanding stock options, vesting of RSUs, and issuance of RSUs vested but not released	2,449,034
ESPP	293,888
Shares of common stock available for grant under the 2011 Plan	672,223
Noncontrolling interest in Bluehill ID AG	10,355
Warrants to purchase common stock	765,000
Shares of common stock issuable on conversion of Series B Preferred Stock	5,000,000
Total	9,190,500

Common Stock Equivalents Excluded from Diluted Net loss Per Share

The following common stock equivalents have been excluded from diluted net loss per share for the nine months ended September 30, 2018 and 2017 because their inclusion would be anti-dilutive:

	Nine Months Ended September 30,
	2018		2017
Shares of common stock subject to outstanding RSUs		1,455,045		1,698,900
Shares of common stock subject to outstanding options		621,971		675,485
Shares of common stock subject to outstanding warrants		765,000		765,000
Shares of common stock reserved to acquire remaining share of noncontrolling interest		10,355		10,355
Shares of common stock issuable upon conversion of Series B Preferred Stock		5,000,000		—
Total		7,852,371		3,149,740