Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2019	Mar. 31, 2019	[1]
ASSETS
Cash and cash equivalents	$ 14,076,290	$ 6,877,304
Marketable securities, short-term		12,487,821
Accounts receivable, net of allowance for uncollectible accounts of $15,000	3,215,785	2,995,638
Inventories	4,355,332	4,264,876
Prepaid expenses and other assets	847,259	816,045
Total current assets	22,494,666	27,441,684
Fixed assets
Machinery and equipment	9,381,906	9,365,806
Leasehold improvements	1,787,269	1,787,269
	11,169,175	11,153,075
Less accumulated depreciation and amortization	10,438,174	10,258,240
Net fixed assets	731,001	894,835
Deferred tax assets	68,495	353,735
Marketable securities, long-term	58,798,500	54,925,633
Right-of-use asset – operating lease	188,743
Total assets	82,281,405	83,615,887
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	324,413	375,188
Accrued payroll and other	425,547	460,488
Operating lease	173,852
Total current liabilities	923,812	835,676
Operating lease	42,782
Total liabilities	966,594	835,676
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,846,010 issued and outstanding as of September 30, 2019 and March 31, 2019	48,460	48,460
Additional paid-in capital	19,958,918	19,910,558
Accumulated other comprehensive income (loss)	666,054	(82,725)
Retained earnings	60,641,379	62,903,918
Total shareholders’ equity	81,314,811	82,780,211
Total liabilities and shareholders’ equity	$ 82,281,405	$ 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.