CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Dec. 31, 2011	Mar. 31, 2011
Current assets:
Cash and cash equivalents	$ 5,560,570	$ 6,063,573
Short-term investments	6,742,425	8,020,577
Accounts receivable, net	2,397,799	2,085,262
Inventories	810,120	677,960
Other	450,608	348,100
Total current assets	15,961,522	17,195,472
Property, plant, and equipment, net	1,180,095	1,210,542
Intangible assets, net	1,161,339	1,725,136
Long-term investments	4,437,070	5,508,701
Deferred tax assets	84,292	87,031
Total assets	22,824,318	25,726,882
Current liabilities:
Accounts payable	565,764	658,107
Current portion - deferred rent	35,000	35,000
Income tax payable	11,865	6,901
Accrued liabilities:
Compensation	1,693,502	1,597,657
Other	488,344	247,451
Total current liabilities	2,794,475	2,545,116
Deferred rent - less current portion	50,851	77,272
Accrued pension liability	416,114	475,845
Total liabilities	3,261,440	3,098,233
Commitments and Contingencies
Shareholders' equity:
Common stock $.01 par value; 40,000,000 shares authorized, 20,808,532 and 20,664,332 shares issued and outstanding at December 31, 2011 and March 31, 2011, respectively	208,085	206,643
Additional paid-in capital	54,724,782	54,014,368
Accumulated deficit	(34,942,796)	(31,265,464)
Accumulated other comprehensive loss	(427,193)	(326,898)
Total shareholders' equity	19,562,878	22,628,649
Total liabilities and shareholders' equity	$ 22,824,318	$ 25,726,882