Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2015	Mar. 31, 2015
Current assets
Cash and cash equivalents	$ 12,290,435	$ 9,437,262	[1]
Marketable securities, short-term	17,559,217	20,099,288	[1]
Accounts receivable, net of allowance for uncollectible accounts of $15,000	3,039,738	2,963,974	[1]
Inventories	3,170,601	3,742,492	[1]
Deferred tax assets	147,219	102,052	[1]
Prepaid expenses and other assets	846,546	574,913	[1]
Total current assets	37,053,756	36,919,981	[1]
Fixed assets
Machinery and equipment	8,629,333	8,604,926	[1]
Leasehold improvements	1,522,948	1,524,298	[1]
Property, Plant, and Equipment	10,152,281	10,129,224	[1]
Less accumulated depreciation	8,080,567	7,873,816	[1]
Net fixed assets	2,071,714	2,255,408	[1]
Marketable securities, long-term	70,432,372	70,913,807	[1]
Total assets	109,557,842	110,089,196	[1]
Current liabilities
Accounts payable	386,555	358,818	[1]
Accrued payroll and other	568,821	$ 1,127,136	[1]
Income taxes payable	1,475,474
Total current liabilities	2,430,850	$ 1,485,954	[1]
Long-term deferred tax liabilities	138,201	275,708	[1]
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,866,181 issued and outstanding as of June 30, 2015 and 4,857,953 issued and outstanding as of March 31, 2015	48,662	48,580	[1]
Additional paid-in capital	20,875,163	20,850,762	[1]
Accumulated other comprehensive income	437,948	746,447	[1]
Retained earnings	85,627,018	86,681,745	[1]
Total shareholders’ equity	106,988,791	108,327,534	[1]
Total liabilities and shareholders’ equity	$ 109,557,842	$ 110,089,196	[1]

[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.