CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (1,609,292)	$ (1,019,355)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	87,013	288,548
(Gain) loss on disposal of equipment	(5,881)	599
Amortization of premium on marketable securities	3,342	8,091
Share-based consulting expense	0	1,623
Share-based compensation expense	16,044	162,435
Deferred income tax expense (benefit)	2,178	(1,117)
Deferred rent credit	(9,263)	(9,111)
Changes in operating assets and liabilities:
Accounts receivable, net	60,458	24,329
Inventories	39,773	(122,672)
Other current assets	23,110	(107,267)
Accounts payable	264,500	137,599
Accrued compensation	19,415	(202,540)
Accrued liabilities, other	383,436	96,108
Accrued pension liability, net	40,073	41,029
Net cash used in operating activities	(685,094)	(701,701)
Cash flows from investing activities:
Proceeds from maturity of available-for-sale investments	1,000,000	0
Proceeds from maturity of held-to-maturity investments	820,000	3,320,000
Purchases of available-for-sale investments	0	(3,218,286)
Purchases of property, plant and equipment	(189,789)	(73,902)
Proceeds from sale of property, plant and equipment	6,080	0
Purchase of intangible assets	0	(4,440)
Net cash provided by investing activities	1,636,291	23,372
Cash flows from financing activities:
Net cash provided by financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	9,312	(18,642)
Net increase (decrease) in cash and cash equivalents	960,509	(696,971)
Cash and cash equivalents at beginning of period	3,533,864	4,653,226
Cash and cash equivalents at end of period	4,494,373	3,956,255
Cash paid during the period for income taxes	$ 17,770	$ 18,592