Fair Value Measurements (Tables)

9 Months Ended

Oct. 01, 2017

Fair Value, Assets Measured on Recurring Basis

We measure and report certain assets at fair value at October 1, 2017 on a recurring basis as follows:



	Fair Value as of October 1, 2017
	Level 1		Level 2		Level 3		Total
Assets:	(in thousands)
Cash equivalents:
Money market funds	$	4,173	$	—	$	—	$	4,173
Corporate debt securities	—		5,989		—		5,989
Government debt securities	—		2,299		—		2,299
Total cash equivalents	4,173		8,288		—		12,461
Marketable Securities:							—
Corporate debt securities	—		81,421		—		81,421
Government debt securities	—		6,601		—		6,601
Total marketable securities	—		88,022		—		88,022

Total cash equivalents and marketable securities	$	4,173	$	96,310	$	—	$	100,483

Schedule of Warrants

As of October 1, 2017, warrants issued and outstanding were as follows:



	Date of Issuance	Number of Warrants	Exercise Price		Expiration Date

Common stock warrants	September 2015	83,006	$	2.50	February 2019

As of January 1, 2017, warrants issued and outstanding were as follows:



	Date of Issuance	Number of Warrants	Exercise Price		Expiration Date
	Date of Issuance	Number of Warrants	Exercise Price		Expiration Date

Common stock warrants	October 2013	38,748	$	7.74	October 2023
Common stock warrants	September 2015	283,005	$	2.50	February 2019
Common stock warrants	February 2016	20,251	$	4.00	February 2019
Common stock warrants	February 2016	9,000	$	0.05	January 2018
Common stock warrants	May 2016	126,400	$	4.00	May 2026

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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