CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (3,536,772)	$ (1,658,881)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	179,123	576,665
(Gain) loss on disposal of equipment	(5,000)	2,797
Amortization of premium on marketable securities	6,070	26,716
Share-based consulting expense	0	1,623
Share-based compensation expense	920,729	353,060
Deferred income tax expense	4,979	2,860
Deferred rent	(18,526)	(18,374)
Changes in operating assets and liabilities:
Accounts receivable, net	197,216	100,537
Inventories	97,787	(175,833)
Other current assets	127,104	(102,998)
Accounts payable	51,232	26,516
Accrued compensation	(51,129)	(68,162)
Accrued liabilities, other	(78,619)	78,202
Accrued pension liability, net	(137,089)	(36,401)
Net cash used in operating activities	(2,242,895)	(891,673)
Cash flows from investing activities:
Proceeds from maturity of available-for-sale investments	2,000,000	2,000,000
Proceeds from maturity of held-to-maturity investments	3,940,000	3,800,000
Purchases of available-for-sale investments	0	(3,218,286)
Purchases of held-to-maturity investments	0	(1,780,000)
Purchases of property, plant and equipment	(208,768)	(93,981)
Proceeds from sale of property, plant and equipment	6,773	7,276
Payments for intangible assets	(41,300)	(4,440)
Net cash provided by investing activities	5,696,705	710,569
Cash flows from financing activities:
Proceeds from exercise of options	69,360	150,000
Net cash provided by financing activities	69,360	150,000
Effect of exchange rate changes on cash and cash equivalents	34,724	(10,580)
Net increase (decrease) in cash and cash equivalents	3,557,894	(41,684)
Cash and cash equivalents at beginning of period	3,533,864	4,653,226
Cash and cash equivalents at end of period	7,091,758	4,611,542
Cash paid during the period for income taxes	$ 25,334	$ 35,507