CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Jun. 30, 2012	Mar. 31, 2012
Current assets:
Cash and cash equivalents	$ 3,956,255	$ 4,653,226
Short-term investments	8,833,786	7,200,901
Accounts receivable, net	2,635,682	2,704,434
Inventories	814,072	698,742
Other	468,052	363,639
Total current assets	16,707,847	15,620,942
Property, plant, and equipment, net	1,135,275	1,171,979
Intangible assets, net	734,711	945,880
Long-term investments	2,685,660	4,429,140
Deferred tax assets	117,181	122,872
Total assets	21,380,674	22,290,813
Current liabilities:
Accounts payable	724,802	593,585
Current portion - deferred rent	35,000	35,000
Income tax payable	7,378	17,892
Accrued liabilities:
Compensation	1,365,247	1,576,147
Other	419,533	316,995
Total current liabilities	2,551,960	2,539,619
Deferred rent - less current portion	32,932	42,043
Accrued pension liability	491,562	474,396
Total liabilities	3,076,454	3,056,058
Commitments and Contingencies
Shareholders' equity:
Common stock $.01 par value; 40,000,000 shares authorized, 20,926,582 and 20,808,532 shares issued and outstanding at June 30, 2012 and March 31, 2012, respectively	209,266	208,085
Additional paid-in capital	55,069,547	54,906,670
Accumulated deficit	(36,535,190)	(35,515,835)
Accumulated other comprehensive net loss	(439,403)	(364,165)
Total shareholders' equity	18,304,220	19,234,755
Total liabilities and shareholders' equity	$ 21,380,674	$ 22,290,813