Note 4 - Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2013

Stockholders' Equity Note [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Six months ended June 30, 2013
	Total Stock Options Outstanding			Weighted Average Exercise Price per Share		Nonvested Stock Options			Weighted Average  Grant Date Fair Value per Share
December 31, 2012		5,016,916		$	4.54		404,500		$	2.30
Granted		863,604			1.68		863,604			1.22
Vested		-			-		(389,750	)		1.75
Exercised		(9,681	)		1.28		-			-
Forfeited, Canceled		(186,895	)		2.63		(121,250	)		0.94
June 30, 2013		5,683,944		$	4.18		757,104		$	1.56

Schedule of Share-based Compensation, Activity [Table Text Block]

	As of June 30, 2013
	Stock Options Outstanding		Vested Stock Options
Quantity		5,683,944		4,926,840
Weighted-average exercise price	$	4.18	$	4.49
Weighted Average Remaining Contractual Term (in Years)		7.24		6.90
Intrinsic value	$	146,762	$	129,358