Note 5. Stock-Based Compensation (Detail) - Schedule of Exercisable Options by Exercise Price (USD $)	6 Months Ended
	Jun. 30, 2012
Stock Options Exercisable (in Shares)	1,138,016
Exercisable - Weighted Average Exercise Price	$ 1.21
Exercisable [Member] | $.55 To $1.00 Range [Member]
Range of Exercise Prices - Lower Limit	$ 0.55
Range of Exercise Prices - Upper Limit	$ 1.00
Exercisable [Member] | $1.01 To $1.50 [Member]
Range of Exercise Prices - Lower Limit	$ 1.01
Range of Exercise Prices - Upper Limit	$ 1.50
Exercisable [Member] | $1.51 To $1.74 [Member]
Range of Exercise Prices - Lower Limit	$ 1.51
Range of Exercise Prices - Upper Limit	$ 1.74
$.55 To $1.00 Range [Member]
Range of Exercise Prices - Lower Limit	$ 0.55
Range of Exercise Prices - Upper Limit	$ 1.00
Stock Options Exercisable (in Shares)	252,000
Exercisable - Weighted Average Exercise Price	$ 0.71
$1.01 To $1.50 [Member]
Range of Exercise Prices - Lower Limit	$ 1.01
Range of Exercise Prices - Upper Limit	$ 1.50
Stock Options Exercisable (in Shares)	654,000
Exercisable - Weighted Average Exercise Price	$ 1.26
$1.51 To $1.74 [Member]
Range of Exercise Prices - Lower Limit	$ 1.51
Range of Exercise Prices - Upper Limit	$ 1.74
Stock Options Exercisable (in Shares)	232,016
Exercisable - Weighted Average Exercise Price	$ 1.64