CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (2,609,794)	$ (1,851,980)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	552,275	567,576
Loss on disposal of equipment	6,475	192
Amortization of premium on marketable securities	17,039	0
Share-based consulting expense	2,787	8,202
Share-based compensation expense	288,754	140,490
Deferred income taxes	(3,040)	(4,925)
Deferred rent	(17,614)	(17,614)
Changes in operating assets and liabilities:
Accounts receivable, net	(196,435)	(187,514)
Inventories	(65,281)	(125,674)
Other current assets	(143,370)	(57,949)
Accounts payable	(27,130)	1,196
Accrued liabilities	(20,515)	94,179
Accrued pension liability, net	(65,303)	(48,246)
Net cash used in operating activities	(2,281,152)	(1,482,067)
Cash flows from investing activities:
Proceeds from maturity of marketable securities	11,018,268	2,500,000
Purchases of marketable securities	(5,280,042)	(5,000,000)
Purchases of property, plant and equipment	(106,325)	(94,506)
Purchase of intangible assets	(67,198)	(11,300)
Net cash provided by (used in) investing activities	5,564,703	(2,605,806)
Cash flows from financing activities:
Net proceeds from public offering of common stock	0	14,917,059
Net proceeds from exercise of warrants and options	207,050	2,275,906
Net cash provided by financing activities	207,050	17,192,965
Effect of exchange rate changes on cash and cash equivalents	(15,824)	(28,674)
Net increase in cash and cash equivalents	3,474,777	13,076,418
Cash and cash equivalents at beginning of period	6,063,573	2,311,269
Cash and cash equivalents at end of period	9,538,350	15,387,687
Cash paid during the period for interest	57	0
Cash (paid) received during the period for income taxes	$ 24,074	$ (248)