Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2015	Mar. 31, 2015	[1]
Current assets
Cash and cash equivalents	$ 12,716,318	$ 9,437,262
Marketable securities, short term	23,175,666	20,099,288
Accounts receivable, net of allowance for uncollectible accounts of $15,000	2,782,968	2,963,974
Inventories	3,147,868	3,742,492
Deferred tax assets	108,509	102,052
Prepaid expenses and other assets	635,323	574,913
Total current assets	42,566,652	36,919,981
Fixed assets
Machinery and equipment	8,735,764	8,604,926
Leasehold improvements	1,539,965	1,524,298
	10,275,729	10,129,224
Less accumulated depreciation	8,288,450	7,873,816
Net fixed assets	1,987,279	2,255,408
Marketable securities, long term	60,781,110	70,913,807
Total assets	105,335,041	110,089,196
Current liabilities
Accounts payable	445,083	358,818
Accrued payroll and other	628,104	1,127,136
Total current liabilities	1,073,187	1,485,954
Long-term deferred tax liabilities	74,268	275,708
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,844,845 issued and outstanding as of September 30, 2015 and 4,857,953 issued and outstanding as of March 31, 2015	48,449	48,580
Additional paid-in capital	19,665,966	20,850,762
Accumulated other comprehensive income	402,579	746,447
Retained earnings	84,070,592	86,681,745
Total shareholders’ equity	104,187,586	108,327,534
Total liabilities and shareholders’ equity	$ 105,335,041	$ 110,089,196

[1] The March 31, 2015 Balance Sheet is derived from the audited financial statements contained in our Annual Report on Form 10-K for the fiscal year ended March 31, 2015.