Fair Value Measurements

3 Months Ended

Mar. 31, 2016

Fair Value Measurements [Abstract]

Fair Value Measurements

10.Fair Value Measurements

Assets and liabilities recorded at fair value on the balance sheets are categorized based upon the level of judgment associated with the inputs used to measure the fair value.  Level inputs are as follows:

Level 1 – quoted prices in active markets for identical assets or liabilities.

Level 2 – other significant observable inputs for the assets or liabilities through corroboration with market data at the measurement date.

Level 3 – significant unobservable inputs that reflect management's best estimate of what market participants would use to price the assets or liabilities at the measurement date.

The following table summarizes fair value measurements by level at March 31, 2016 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	67,374	$	—	$	—		$	67,374
Warrant liability		—		—		(878	)		(878	)

The following table summarizes fair value measurements by level at December 31, 2015 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	20,673	$	—	$	—		$	20,673
Short-term investments		35,035		—		—			35,035
Warrant liability		—		—		(693	)		(693	)

Liabilities measured at market value on a recurring basis include warrant liability resulting from our August 2011 equity financing. In accordance with ASC 815-40, the warrant liability are marked to market each quarter-end until they are completely settled. The warrants are valued using the Black-Scholes method, using assumptions consistent with our application of ASC 505-50. The change in the fair value of the liabilities classified in Level III is due to the unrealized loss of $0.2 million recognized. The loss is presented in the Condensed Statement of Operations (see Note 8).

We consider carrying amounts of accounts receivable, accounts payable and accrued expenses to approximate fair value due to the short-term nature of these financial instruments.  

Our non-financial assets are measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment charge is recognized.  Our non-financial assets were not material at March 31, 2016 or March 31, 2015.