Note 3 - Fair Value Measurements (Detail)	12 Months Ended
	Dec. 31, 2012
Percentage Icrease in the Expected Term	10.00%
Percentage Icrease in the Expected Term	10.00%
Percentage Decrease in Warrant Liability	18.00%
Percentage Increase Decrease in Company Stock Price	10.00%
Increase [Member]
Increase in Warrant Liability	3.00%
Decrease [Member]
Percentage Icrease in the Expected Term	10.00%
Percentage Icrease in the Expected Term	10.00%
Percentage Decrease in Warrant Liability	5.00%