Equity Incentive Plans (Details)	Mar. 31, 2013
Option Approval	19,275,000
Options Outstanding	16,463,508
Options Available For Future Grant	2,254,957
Options Outstanding and Options Available, Total	18,718,465
Amended and Restated Stock Option Plan 2002 [Member]
Option Approval	3,200,000
Options Outstanding	3,200,000
Options Available For Future Grant	0
Options Outstanding and Options Available, Total	3,200,000
Stock Option Plan 2006 [Member]
Option Approval	2,500,000
Options Outstanding	2,500,000
Options Available For Future Grant	0
Options Outstanding and Options Available, Total	2,500,000
Stock Option Plan 2009 [Member]
Option Approval	1,500,000
Options Outstanding	1,500,000
Options Available For Future Grant	0
Options Outstanding and Options Available, Total	1,500,000
Stock Option Plan 2010 [Member]
Option Approval	3,500,000
Options Outstanding	3,500,000
Options Available For Future Grant	0
Options Outstanding and Options Available, Total	3,500,000
Stock Option Plan 2013 [Member]
Option Approval	3,500,000
Options Outstanding	1,245,043
Options Available For Future Grant	2,254,957
Options Outstanding and Options Available, Total	3,500,000
Key Personnel Option Grants [Member]
Option Approval	5,075,000
Options Outstanding	4,518,465
Options Available For Future Grant	0
Options Outstanding and Options Available, Total	4,518,465
Board Of Directors [Member]
Option Approval	8,575,000
Board Of Directors [Member] | Amended and Restated Stock Option Plan 2002 [Member]
Option Approval	0
Board Of Directors [Member] | Stock Option Plan 2006 [Member]
Option Approval	0
Board Of Directors [Member] | Stock Option Plan 2009 [Member]
Option Approval	0
Board Of Directors [Member] | Stock Option Plan 2010 [Member]
Option Approval	0
Board Of Directors [Member] | Stock Option Plan 2013 [Member]
Option Approval	3,500,000
Board Of Directors [Member] | Key Personnel Option Grants [Member]
Option Approval	5,075,000
Board Of Directors and Shareholders [Member]
Option Approval	10,700,000
Board Of Directors and Shareholders [Member] | Amended and Restated Stock Option Plan 2002 [Member]
Option Approval	3,200,000
Board Of Directors and Shareholders [Member] | Stock Option Plan 2006 [Member]
Option Approval	2,500,000
Board Of Directors and Shareholders [Member] | Stock Option Plan 2009 [Member]
Option Approval	1,500,000
Board Of Directors and Shareholders [Member] | Stock Option Plan 2010 [Member]
Option Approval	3,500,000
Board Of Directors and Shareholders [Member] | Stock Option Plan 2013 [Member]
Option Approval	0
Board Of Directors and Shareholders [Member] | Key Personnel Option Grants [Member]
Option Approval	0