Note 10. Stock-Based Awards (Details) (USD $)	1 Months Ended	0 Months Ended	1 Months Ended	12 Months Ended
	Apr. 30, 2012	Aug. 15, 2003	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jul. 26, 2012	Aug. 15, 2007	Aug. 15, 2000
Note 10. Stock-Based Awards (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		450,000				7,000,000	5,000,000	4,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		10,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			1,758,369		1,758,369
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				6 years 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term				5 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term				6 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)				$ 0.90	$ 1.63
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars)				$ 55,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value (in Dollars)				40,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value (in Dollars)				52,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars)				25,000	398,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross	48,656		144,808
Fair Value Inputs, Long-term Revenue Growth Rate			80.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Unrecognized Stock Based Compensation Expense Related To Options (in Dollars)				2,100,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition				2 years 6 months
Cashless Exercise of Stock Options [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period					706,149
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					1,954,715
Nonvested Restricted Stock [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross			306,606
Restricted Stock [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	44,733		253,767
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition				1 year 292 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)				$ 200,000
Management [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross			286,606
2012 PIP [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross			108,959
Target Incentive Opportunity [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate			75.00%
Individual Executive Performance Milestones [Member]
Note 10. Stock-Based Awards (Details) [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate			25.00%