CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Sep. 30, 2013	Mar. 31, 2013
Current assets:
Cash and cash equivalents	$ 7,091,758	$ 3,533,864
Short-term investments	5,445,063	7,936,605
Accounts receivable, net	2,400,531	2,553,447
Inventories	625,102	718,933
Other	442,351	566,536
Total current assets	16,004,805	15,309,385
Property, plant, and equipment, net	1,108,079	1,033,085
Intangible assets, net	127,328	100,502
Long-term investments	0	3,451,711
Deferred tax assets	148,900	146,052
Total assets	17,389,112	20,040,735
Current liabilities:
Accounts payable	673,500	618,916
Current portion - deferred rent	21,615	35,000
Income tax payable	6,123	7,729
Accrued liabilities:
Compensation	1,507,596	1,550,846
Other	406,549	476,287
Total current liabilities	2,615,383	2,688,778
Deferred rent	0	5,141
Accrued pension liability	557,495	660,580
Total liabilities	3,172,878	3,354,499
Commitments and Contingencies
Shareholders' equity:
Common stock $.01 par value; 40,000,000 shares authorized, 21,467,390 and 21,005,582 shares issued and outstanding at September 30, 2013 and March 31, 2013, respectively	214,674	210,056
Additional paid-in capital	56,851,809	55,866,338
Accumulated deficit	(42,357,753)	(38,820,981)
Accumulated other comprehensive net loss	(492,496)	(569,177)
Total shareholders' equity	14,216,234	16,686,236
Total liabilities and shareholders' equity	$ 17,389,112	$ 20,040,735