Note 7. Stock-Based Awards (Details) - Stock Options Activity (USD $)	0 Months Ended	1 Months Ended	6 Months Ended
	Aug. 15, 2003	Mar. 31, 2013	Sep. 30, 2013
Note 7. Stock-Based Awards (Details) - Stock Options Activity [Line Items]
Outstanding - Number of Shares (in Shares)		5,780,608	4,506,775
Oustanding - Exercise Price Range Minimum		$ 0.79	$ 0.85
Oustanding - Exercise Price Range Maximum		$ 4.88	$ 4.88
Outstanding - Weighted Average Exercise Price		$ 2.09	$ 1.85
Outstanding - Weighted Average Remaining Contractual Life		6 years 219 days	6 years 36 days
Granted (in Shares)	10,000
Granted		$ 0.79	$ 0.85
Granted		$ 4.88	$ 4.88
Vested and expected to vest at September 30, 2013		$ 0.79	$ 0.85
Vested and expected to vest at September 30, 2013		$ 4.88	$ 4.88
Exercisable at September 30, 2013		$ 0.79	$ 0.85
Exercisable at September 30, 2013		$ 4.88	$ 4.88
Granted [Member]
Note 7. Stock-Based Awards (Details) - Stock Options Activity [Line Items]
Oustanding - Exercise Price Range Minimum			$ 0.90
Oustanding - Exercise Price Range Maximum			$ 1.09
Granted (in Shares)			721,000
Granted			$ 0.90
Granted			$ 1.09
Granted			$ 1.03
Vested and expected to vest at September 30, 2013			$ 0.90
Vested and expected to vest at September 30, 2013			$ 1.09
Exercisable at September 30, 2013			$ 0.90
Exercisable at September 30, 2013			$ 1.09
Exercised [Member]
Note 7. Stock-Based Awards (Details) - Stock Options Activity [Line Items]
Exercised (in Shares)			0
Canceled [Member]
Note 7. Stock-Based Awards (Details) - Stock Options Activity [Line Items]
Canceled (1) (in Shares)			(1,994,833)	[1]
Canceled (1)			$ 0.97	[1]
Canceled (1)			$ 3.62	[1]
Canceled (1)			$ 2.24	[1]
Vested and Expected to Vest [Member]
Note 7. Stock-Based Awards (Details) - Stock Options Activity [Line Items]
Oustanding - Exercise Price Range Minimum			$ 0.85
Oustanding - Exercise Price Range Maximum			$ 4.88
Granted			$ 0.85
Granted			$ 4.88
Vested and expected to vest at September 30, 2013 (in Shares)			4,439,571
Vested and expected to vest at September 30, 2013			$ 0.85
Vested and expected to vest at September 30, 2013			$ 4.88
Vested and expected to vest at September 30, 2013			$ 1.85
Vested and expected to vest at September 30, 2013			6 years 36 days
Exercisable at September 30, 2013			$ 0.85
Exercisable at September 30, 2013			$ 4.88
Exercisable [Member]
Note 7. Stock-Based Awards (Details) - Stock Options Activity [Line Items]
Oustanding - Exercise Price Range Minimum			$ 0.85
Oustanding - Exercise Price Range Maximum			$ 4.88
Granted			$ 0.85
Granted			$ 4.88
Vested and expected to vest at September 30, 2013			$ 0.85
Vested and expected to vest at September 30, 2013			$ 4.88
Exercisable at September 30, 2013 (in Shares)			3,466,004
Exercisable at September 30, 2013			$ 0.85
Exercisable at September 30, 2013			$ 4.88
Exercisable at September 30, 2013			$ 1.96
Exercisable at September 30, 2013			5 years 109 days

[1] Includes cancellation of unvested stock options granted to our former President and Chief Executive Officer, Cynthia F. Ansari (1,125,000 stock options), and our former VP, Corporate Development and Chief Financial Officer, Katherine L. Wolf (612,458 stock options).