Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price (USD $)	6 Months Ended
	Jun. 30, 2013
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Stock Options Exercisable (in Shares)	1,034,165
Exercisable - Weighted Average Exercise Price	$ 1.17
Range $.55 - $1.00 (Member) | Exercisable [Member]
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Range of Exercise Prices - Lower Limit	$ 0.55
Range of Exercise Prices - Upper Limit	$ 1.00
Range $.55 - $1.00 (Member)
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Stock Options Exercisable (in Shares)	212,000
Exercisable - Weighted Average Exercise Price	$ 0.75
Range $1.01 - $1.50 (Member) | Exercisable [Member]
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Range of Exercise Prices - Lower Limit	$ 1.01
Range of Exercise Prices - Upper Limit	$ 1.50
Range $1.01 - $1.50 (Member)
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Stock Options Exercisable (in Shares)	672,165
Exercisable - Weighted Average Exercise Price	$ 1.19
Range $1.51 to $1.68 [Member] | Exercisable [Member]
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Range of Exercise Prices - Lower Limit	$ 1.51
Range of Exercise Prices - Upper Limit	$ 1.68
Range $1.51 to $1.68 [Member]
Note 5 - Stock-Based Compensation (Details) - Exercisable Options by Exercise Price [Line Items]
Stock Options Exercisable (in Shares)	150,000
Exercisable - Weighted Average Exercise Price	$ 1.67