CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net loss	$ (3,677,332)	$ (3,319,911)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	832,309	848,385
Loss on disposal of equipment	6,475	192
Amortization of premium on marketable securities	27,210	7,226
Share-based consulting expense	4,125	9,739
Share-based compensation expense	498,906	279,083
Deferred income taxes	(4,698)	(5,863)
Deferred rent	(26,421)	(26,421)
Changes in operating assets and liabilities:
Accounts receivable, net	(374,068)	(261,136)
Inventories	(146,058)	(248,656)
Other current assets	(106,156)	(48,492)
Accounts payable	(82,491)	4,474
Accrued liabilities	356,589	616,036
Accrued pension liability, net	(25,428)	(16,109)
Net cash used in operating activities	(2,717,038)	(2,161,453)
Cash flows from investing activities:
Proceeds from maturity of marketable securities	13,018,252	4,000,000
Purchases of marketable securities	(10,686,270)	(16,311,352)
Purchases of property, plant and equipment	(222,826)	(128,935)
Purchase of intangible assets	(77,738)	(11,300)
Net cash provided by (used in) investing activities	2,031,418	(12,451,587)
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	208,825	2,467,007
Net cash provided by financing activities	208,825	17,384,066
Effect of exchange rate changes on cash and cash equivalents	(26,208)	(37,554)
Net (decrease) increase in cash and cash equivalents	(503,003)	2,733,472
Cash and cash equivalents at beginning of period	6,063,573	2,311,269
Cash and cash equivalents at end of period	5,560,570	5,044,741
Cash paid during the period for interest	57	0
Cash paid during the period for income taxes	$ 31,307	$ 9,633