CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Dec. 31, 2013	Mar. 31, 2013
Current assets:
Cash and cash equivalents	$ 8,164,251	$ 3,533,864
Short-term investments	4,452,234	7,936,605
Accounts receivable, net	2,534,929	2,553,447
Inventories	469,094	718,933
Other	554,412	566,536
Total current assets	16,174,920	15,309,385
Property, plant, and equipment, net	1,051,857	1,033,085
Intangible assets, net	119,455	100,502
Long-term investments	0	3,451,711
Deferred tax assets	153,347	146,052
Total assets	17,499,579	20,040,735
Current liabilities:
Accounts payable	645,170	618,916
Current portion - deferred rent	12,351	35,000
Income taxes payable	18,242	7,729
Accrued liabilities:
Compensation	1,836,589	1,550,846
Other	354,719	476,287
Total current liabilities	2,867,071	2,688,778
Deferred rent	0	5,141
Accrued pension liability	666,818	660,580
Total liabilities	3,533,889	3,354,499
Commitments and contingencies
Shareholders' equity:
Common stock $.01 par value; 40,000,000 shares authorized, 21,572,390 and 21,005,582 shares issued and outstanding at December 31, 2013 and March 31, 2013, respectively	215,274	210,056
Additional paid-in capital	57,243,806	55,866,338
Accumulated deficit	(43,028,585)	(38,820,981)
Accumulated other comprehensive loss	(464,805)	(569,177)
Total shareholders' equity	13,965,690	16,686,236
Total liabilities and shareholders' equity	$ 17,499,579	$ 20,040,735