Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2016	Mar. 31, 2016	[1]
Current assets
Cash and cash equivalents	$ 5,690,673	$ 7,534,593
Marketable securities, short-term	22,318,903	19,697,384
Accounts receivable, net of allowance for uncollectible accounts of $15,000	3,368,170	2,244,086
Inventories	2,908,881	3,205,233
Prepaid expenses and other assets	697,788	734,524
Total current assets	34,984,415	33,415,820
Fixed assets
Machinery and equipment	8,973,375	8,840,033
Leasehold improvements	1,559,719	1,539,965
	10,533,094	10,379,998
Less accumulated depreciation and amortization	9,080,831	8,688,285
Net fixed assets	1,452,263	1,691,713
Long-term deferred tax assets	123,410	51,188
Marketable securities, long-term	60,777,962	65,695,335
Total assets	97,338,050	100,854,056
Current liabilities
Accounts payable	310,030	317,990
Accrued payroll and other	563,960	556,674
Deferred revenue	383,877	714,805
Total current liabilities	1,257,867	1,589,469
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,836,010 issued and outstanding as of September 30, 2016 and 4,835,010 issued and outstanding as of March 31, 2016	48,360	48,350
Additional paid-in capital	19,268,752	19,205,682
Accumulated other comprehensive income	436,153	451,359
Retained earnings	76,326,918	79,559,196
Total shareholders’ equity	96,080,183	99,264,587
Total liabilities and shareholders’ equity	$ 97,338,050	$ 100,854,056

[1] The March 31, 2016 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, 2016.