The following table presents a summary of equity offerings for the years ended December 31, 2013, 2012, and 2011 (in thousands, except for per share amounts)



Date	Transaction	# of Common Shares/ Units Sold (in 000’s)	Price per Share/Unit	# of Warrants Issued (in 000’s)	Exercise Price per Warrant	Net Proceeds (in 000’s) (1)	Offering as % of Out-standing Common Stock (2)
August 6, 2013	Offering to a limited number of institutional and other investors	3,681	$3.80	n/a	n/a	$13,000	4.00%
March 26, 2013	Shelf underwritten offering (4)	4,715	$3.25	n/a	n/a	$14,300	5.40%
September 19, 2012	Shelf offering to a limited number of institutional and other investors	4,382	$2.30	n/a	n/a	$9,200	5.30%
April 18, 2012	Shelf offering to a limited number of institutional and other investors	8,139	$1.05	n/a	n/a	$8,300	10.70%
September 14, 2011	Shelf offering to two institutional investors	7,800	$0.88	n/a	n/a	$6,500	11.60%
March 30, 2011	Shelf offering to a limited number of institutional and other investors (3)	3,332	$0.71	n/a	n/a	$4,100	10.20%
		2,691	$0.81	807	$0.88

⁽¹⁾

After deduction of applicable underwriters’ discounts, placement agent fees, and other offering costs.

⁽²⁾

Calculated on an after-issued basis.

⁽³⁾

Offering included the sale of 3,332,117 shares of common stock at $0.71 per share and 2,691,360 units, each consisting of one share of common stock and three-tenths of a warrant to purchase common stock, at $0.81 per unit. The warrants are exercisable beginning September 30, 2011 and expire on September 30, 2016. The warrants were recorded at their relative fair value of approximately $0.4 million as estimated at their grant date using the Black-Scholes option pricing model (see Note 8)

⁽⁴⁾

Ladenburg Thalmann Financial Services Inc. acted as underwriter for the transaction.