CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 9,540,168	$ 8,681,609
Short-term investments	0	3,451,086
Accounts receivable, net	2,663,403	2,875,275
Inventories	526,367	517,217
Other	518,135	507,299
Total current assets	13,248,073	16,032,486
Property, plant, and equipment, net	952,910	997,609
Intangible assets, net	103,428	119,980
Prepaid pension assets	0	855
Deferred tax assets	136,406	150,116
Total assets	14,440,817	17,301,046
Current liabilities:
Accounts payable	670,832	904,879
Current portion - deferred rent	0	2,917
Income taxes payable	28,017	21,922
Accrued liabilities:
Compensation	2,105,483	1,999,966
Other	472,771	479,373
Total current liabilities	3,277,103	3,409,057
Deferred rent - less current portion	26,238	171
Accrued pension liability	588,733	678,118
Total liabilities	3,892,074	4,087,346
Commitments and contingencies
Shareholders' equity:
Common stock $.01 par value; 40,000,000 shares authorized, 22,131,518 and 21,653,835 shares issued and outstanding at September 30, 2014 and March 31, 2014, respectively	221,315	216,538
Additional paid-in capital	58,368,739	57,655,628
Accumulated deficit	(47,444,650)	(44,174,071)
Accumulated other comprehensive loss	(596,661)	(484,395)
Total shareholders' equity	10,548,743	13,213,700
Total liabilities and shareholders' equity	$ 14,440,817	$ 17,301,046