Note 5. Stock-Based Compensation (Detail) - Options Outstanding and Exercisable (USD $)	9 Months Ended
	Sep. 30, 2012
Stock Options Outstanding (in Shares)	2,530,500
Weighted Average Exercise Price	$ 1.10
Weighted Average Remaining Contractual Life	8 years 142 days
$.55 To $1.00 Range [Member]
Range of Exercise Prices - Lower Limit	$ 0.55
Range of Exercise Prices - Upper Limit	$ 1.00
Stock Options Outstanding (in Shares)	218,000
Weighted Average Exercise Price	$ 0.76
Weighted Average Remaining Contractual Life	6 years 29 days
$1.01 To $1.50 [Member]
Range of Exercise Prices - Lower Limit	$ 1.01
Range of Exercise Prices - Upper Limit	$ 1.50
Stock Options Outstanding (in Shares)	2,137,500
Weighted Average Exercise Price	$ 1.09
Weighted Average Remaining Contractual Life	8 years 229 days
$1.51 To $1.74 [Member]
Range of Exercise Prices - Lower Limit	$ 1.51
Range of Exercise Prices - Upper Limit	$ 1.74
Stock Options Outstanding (in Shares)	175,000
Weighted Average Exercise Price	$ 1.68
Weighted Average Remaining Contractual Life	8 years 94 days