Balance Sheets (Current Period Unaudited) - USD ($)	Dec. 31, 2019	Mar. 31, 2019	[1]
ASSETS
Cash and cash equivalents	$ 10,153,173	$ 6,877,304
Marketable securities, short-term	12,055,363	12,487,821
Accounts receivable, net of allowance for uncollectible accounts of $15,000	2,119,037	2,995,638
Inventories	4,159,742	4,264,876
Prepaid expenses and other assets	845,194	816,045
Total current assets	29,332,509	27,441,684
Fixed assets
Machinery and equipment	9,381,906	9,365,806
Leasehold improvements	1,797,245	1,787,269
	11,179,151	11,153,075
Less accumulated depreciation and amortization	10,529,317	10,258,240
Net fixed assets	649,834	894,835
Deferred tax assets	63,467	353,735
Marketable securities, long-term	50,920,291	54,925,633
Right-of-use asset – operating lease	151,749
Total assets	81,117,850	83,615,887
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	153,470	375,188
Accrued payroll and other	558,762	460,488
Operating lease	174,916
Total current liabilities	887,148	835,676
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,846,010 issued and outstanding as of December 31, 2019 and March 31, 2019	48,460	48,460
Additional paid-in capital	19,958,918	19,910,558
Accumulated other comprehensive income (loss)	697,291	(82,725)
Retained earnings	59,526,033	62,903,918
Total shareholders’ equity	80,230,702	82,780,211
Total liabilities and shareholders’ equity	$ 81,117,850	$ 83,615,887

[1] The March 31, 2019 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, 2019.