CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net loss	$ (7,709,158)	$ (5,353,090)	$ (3,305,146)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	278,953	353,238	1,152,929
Gain (loss) on disposal of equipment	38,613	(2,872)	7,617
Amortization of premium on marketable securities	311	8,341	47,559
Share-based consulting expense	0	0	1,623
Share-based compensation expense	1,389,169	1,436,270	810,016
Long term incentive plans	152,592	0	0
Tax expense (benefit)	(83,402)	6,498	(29,053)
Deferred rent	23,962	(37,055)	(36,902)
Changes in operating assets and liabilities, net of merger:
Accounts receivable, net	(337,842)	(257,794)	108,495
Inventories	140,610	207,046	(25,370)
Other current assets	121,688	76,092	(205,778)
Accounts payable	231,663	281,104	30,925
Accrued compensation	635,892	436,765	(25,301)
Accrued liabilities, other	674,283	(5,721)	164,176
Accrued pension liability, net	78,043	(51,000)	79,598
Net cash used in operating activities	(4,364,623)	(2,902,178)	(1,224,612)
Cash flows from investing activities:
Proceeds from maturity of available-for-sale marketable investments	3,450,000	7,930,000	4,200,000
Proceeds from maturity of held-to-maturity marketable investments	0	0	6,920,000
Purchases of available-for-sale marketable investments	0	0	(8,425,034)
Purchases of held-to-maturity marketable investments	0	0	(2,500,000)
Cash acquired from merger with Vision-Sciences	2,019,610
Purchases of property, plant and equipment	(420,726)	(248,105)	(190)
Proceeds from sale of property, plant and equipment	4,103	6,773	5,591
Payments for intangible assets	0	(49,940)	(17,455)
Net cash provided by (used in) investing activities	5,052,987	7,638,728	(6,827)
Cash flows from financing activities:
Proceeds from exercise of stock options	67,850	359,510	150,000
Net cash provided by financing activities	67,850	359,510	150,000
Effect of exchange rates on cash and cash equivalents	(175,921)	51,686	(37,923)
Net increase (decrease) in cash and cash equivalents	580,293	5,147,746	(1,119,362)
Cash and cash equivalents at beginning of year	8,681,610	3,533,864	4,653,226
Cash and cash equivalents at end of year	9,261,903	8,681,610	3,533,864
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	0	0	707
Cash paid during the year for income tax	$ 65,504	$ 71,899	$ 57,288