Note 6. Advances from Customers (Details) - Advances for Future Orders of Scopes and EndoSheath Technology (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Deferred Revenue Arrangement [Line Items]
Beginning balance	$ 135
Ending balance	130
Adjustments	(86)
Stryker [Member]
Deferred Revenue Arrangement [Line Items]
Beginning balance	117		4,433
Ending balance			117
Revenue recognized	(117)		(4,288)
Sales tax			(28)
Adjustments		[1]
Spineview [Member]
Deferred Revenue Arrangement [Line Items]
Beginning balance	420		1,255
Ending balance			420
Revenue recognized	(420)		(837)
Adjustments		[1]	2
Other Customer [Member]
Deferred Revenue Arrangement [Line Items]
Beginning balance	135		5
Ending balance			135
Additional advances received	8		137
Revenue recognized			(7)
Adjustments	(143)	[1]
Adjustments [Member] | Advances from Customers [Member]
Deferred Revenue Arrangement [Line Items]
Adjustments	(143)	[1]	2
Advances from Customers [Member]
Deferred Revenue Arrangement [Line Items]
Beginning balance	672		5,693
Ending balance			672
Additional advances received	8		137
Revenue recognized	(537)		(5,132)
Sales tax			$ (28)

[1] Amount reclassified to deferred revenue