Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Schedule of Preferred Stock and the Accretion Of Dividends Activity

The following table summarizes Series B Preferred Stock and the accretion of dividends activity for the six months ended June 30, 2019 (in thousands):

	Tranche 1		Tranche 2		Total
Series B Preferred Stock
Balance at December 31, 2018	$	12,600	$	8,233	$	20,833
Cumulative dividends on Series B preferred stock		315		202		517
Balance at June 30, 2019	$	12,915	$	8,435	$	21,350
Number of Common Shares Issuable Upon Conversion
Balance at December 31, 2018		3,150		2,058		5,208
Cumulative dividends on Series B preferred stock		79		51		130
Balance at June 30, 2019		3,229		2,109		5,338

Summary of Outstanding Warrants Issued by Company

Below is the summary of outstanding warrants issued by the Company as of June 30, 2019:

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
Total		705,000

Schedule of Common Stock Reserved for Future Issuance

Common Stock Reserved for Future Issuance

Common stock reserved for future issuance as of June 30, 2019 was as follows:

Exercise of outstanding stock options, vesting of restricted stock units ("RSU"), and    issuance of RSUs vested but not released	2,022,331
ESPP	293,888
Shares of common stock available for grant under the 2011 Plan	526,159
Noncontrolling interest in Bluehill ID AG	10,355
Warrants to purchase common stock	705,000
Shares of common stock issuable upon conversion of Series B preferred stock	7,541,449
Total	11,099,182