Balance Sheets (Current Period Unaudited) - USD ($)	Dec. 31, 2015	Mar. 31, 2015
Current assets
Cash and cash equivalents	$ 3,594,164	$ 9,437,262	[1]
Marketable securities, short term	23,629,484	20,099,288	[1]
Accounts receivable, net of allowance for uncollectible accounts of $15,000	1,753,689	2,963,974	[1]
Inventories	3,108,911	3,742,492	[1]
Deferred tax assets	152,789	102,052	[1]
Prepaid expenses and other assets	903,568	574,913	[1]
Total current assets	33,142,605	36,919,981	[1]
Fixed assets
Machinery and equipment	8,766,708	8,604,926	[1]
Leasehold improvements	1,539,965	1,524,298	[1]
	10,306,673	10,129,224	[1]
Less accumulated depreciation and amortization	8,502,002	7,873,816
Net fixed assets	1,804,671	$ 2,255,408	[1]
Long-term deferred tax assets	99,958		[1]
Marketable securities, long term	68,127,073	$ 70,913,807	[1]
Total assets	103,174,307	110,089,196	[1]
Current liabilities
Accounts payable	209,686	358,818	[1]
Accrued payroll and other	650,846	$ 1,127,136	[1]
Deferred revenue	714,805		[1]
Total current liabilities	$ 1,575,337	$ 1,485,954	[1]
Long-term deferred tax liabilities		275,708	[1]
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,844,845 issued and outstanding as of December 31, 2015 and 4,857,953 issued and outstanding as of March 31, 2015	$ 48,449	48,580	[1]
Additional paid-in capital	19,665,966	20,850,762	[1]
Accumulated other comprehensive income	81,357	746,447	[1]
Retained earnings	81,803,198	86,681,745	[1]
Total shareholders’ equity	101,598,970	108,327,534	[1]
Total liabilities and shareholders’ equity	$ 103,174,307	$ 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.