Balance Sheets (Current Period Unaudited) - USD ($)	Dec. 31, 2018	Mar. 31, 2018
ASSETS
Cash and cash equivalents	$ 6,206,549	$ 4,755,082	[1]
Marketable securities, short-term	17,445,586	20,765,809	[1]
Accounts receivable, net of allowance for uncollectible accounts of $15,000	2,717,728	2,888,779	[1]
Inventories	4,141,481	3,650,439	[1]
Prepaid expenses and other assets	755,806	635,160	[1]
Total current assets	31,267,150	32,695,269	[1]
Fixed assets
Machinery and equipment	9,426,267	9,395,987	[1]
Leasehold improvements	1,787,269	1,749,284	[1]
	11,213,536	11,145,271	[1]
Less accumulated depreciation and amortization	10,192,504	9,819,888	[1]
Net fixed assets	1,021,032	1,325,383	[1]
Deferred tax assets	590,391	572,655	[1]
Marketable securities, long-term	51,907,552	52,838,158	[1]
Total assets	84,786,125	87,431,465	[1]
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	313,116	414,970	[1]
Accrued payroll and other	552,834	574,755	[1]
Total current liabilities	865,950	989,725	[1]
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,846,010 shares issued and outstanding as of Dec. 31, 2018 and 4,842,010 as of March 31, 2018	48,460	48,420
Additional paid-in capital	19,910,558	19,599,298	[1]
Accumulated other comprehensive loss	(929,899)	(915,635)	[1]
Retained earnings	64,891,056	67,709,657	[1]
Total shareholders’ equity	83,920,175	86,441,740	[1]
Total liabilities and shareholders’ equity	$ 84,786,125	$ 87,431,465	[1]

[1] The March 31, 2018 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, 2018.