Stock-Based Compensation

6 Months Ended

Jun. 30, 2011

Stock-Based Compensation [Abstract]

Stock-Based Compensation

Note 11. Stock-Based Compensation

Stock Options Plans

The Company has long-term compensation plans that permit the granting of incentive awards in the form of stock options. Generally, the terms of these plans require that the exercise price of the options may not be less than the fair market value of Celsion's Common Stock on the date the options are granted. Options granted generally vest over various time frames or upon milestone accomplishments.  The Company's options generally expire ten years from the date of the grant.

In 2007, the Company adopted the Celsion Corporation 2007 Stock Incentive Plan (the “2007 Plan”) under which 1,000,000 shares were authorized for issuance. The purpose of the 2007 Plan is to promote the long-term growth and profitability of the Company by providing incentives to improve stockholder value and enable the Company to attract, retain and reward the best available persons for positions of substantial responsibility.  The 2007 Plan permits the granting of equity awards in the form of incentive stock options, nonqualified stock options, restricted stock, restricted stock units, stock appreciation rights, phantom stock, and performance awards, or in any combination of the foregoing.  At the Annual Meeting of Stockholders of Celsion held on June 25, 2010, the stockholders approved an amendment to the Plan.  The only material difference between the existing Plan and the amended Plan was the number of shares of common stock available for issuance under the amended Plan which was increased by 1,000,000 to a total of 2,000,000 shares.

Prior to the  adoption of the 2007 Plan, the Company previously adopted two stock plans for directors, officers and employees (one in 2001 and another in 2004) under which 666,667 shares were reserved for future issuance under each of these plans.  As these plans have been superseded by the 2007 Plan, any options previously granted which expire, forfeit, or cancel under these plans can be rolled into the 2007 Plan.  Stock certificates will be issued for any options exercised under these plans.

The fair values of stock options granted were estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model was originally developed for use in estimating the fair value of traded options, which have different characteristics from Celsion's stock options. The model is also sensitive to changes in assumptions, which can materially affect the fair value estimate.

The Company used the following assumptions for determining the fair value of options granted under the Black-Scholes option pricing model: 

	Three months ended June 30, 2011			Three months ended March 31, 2010
Risk-free interest rate		2.72% – 2.84	%		2.48% - 3.24	%
Expected volatility		80.7% -81.1	%		72.1% -72.8	%
Expected life (in years)		6.25			5-6
Expected forfeiture rate		0	%		0	%
Expected dividend yield		0.00	%		0.00	%

Expected volatilities utilized in the model are based on historical volatility of the Company's stock price. The risk free interest rate is derived from values assigned to U.S. Treasury bonds as published in the Wall Street Journal in effect at the time of grant. The model incorporates exercise, pre-vesting and post-vesting forfeiture assumptions based on analysis of historical data. The expected life of the fiscal 2011 and 2010 grants was generated using the simplified method as allowed under Securities and Exchange Commission Staff Accounting Bulletin No. 107.

Total compensation cost related to employee stock options and restricted stock awards amounted to $233,099 and $288,950 for the three months ended June 30, 2011 and 2010, respectively, and $559,976 and $775,619 for the six months ended June 30, 2011 and 2010, respectively .  No compensation cost related to share-based payments arrangements was capitalized as part of the cost of any asset at June 30, 2011 and 2010.

As of June 30, 2011, there was $2.1 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements. That cost is expected to be recognized over a weighted-average period of 2.2 years. The weighted average grant-date fair values of the options granted during the three months ended March 31, 2011 was $2.49 and the weighted average grant-date fair values of the restricted stock awards during the three months ended March 31, 2011 was $2.94.

A summary of the Company's stock option and restricted stock awards for the six month period ended June 30, 2011 is as follows:

	Stock Options					Restricted Stock Awards					Weighted Average Contractual Terms of Equity Awards (in years)
Equity Awards	Options Outstanding			Weighted Average  Exercise Price		Non-vestedRestricted Stock Outstanding			Weighted Average Grant Date Fair Value
Equity awards outstanding at December 31, 2010		2,167,646		$	3.74		77,400		$	3.47
Equity awards granted		748,167		$	2.49		25,000		$	2.47
Equity awards exercised		−			−		(55,700	)	$	3.13
Equity awards forfeited, cancelled or expired		(79,167	)	$	3.06		−			−
Equity awards outstanding at June 30, 2011		2,742,064		$	3.43		46,700		$	3.39	7.4
Aggregate intrinsic value of outstanding awards at June 30, 2011	$	763,287				$	157,379
Equity awards exercisable at June 30, 2011		1,493,902		$	3.97						6.1
Aggregate intrinsic value of vested awards at June 30, 2011	$	339,805

 Collectively, for all the stock option plans as of June 30, 2011, there were a total of 3,488,088 shares reserved, which were comprised of outstanding 2,788,764 equity awards granted and 666,124 equity awards still available for future issuance.