Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2018	Mar. 31, 2018	[1]
ASSETS
Cash and cash equivalents	$ 8,451,861	$ 4,755,082
Marketable securities, short-term	22,924,176	20,765,809
Accounts receivable, net of allowance for uncollectible accounts of $15,000	3,120,773	2,888,779
Inventories	3,621,681	3,650,439
Prepaid expenses and other assets	532,107	635,160
Total current assets	38,650,598	32,695,269
Fixed assets
Machinery and equipment	9,395,987	9,395,987
Leasehold improvements	1,787,269	1,749,284
	11,183,256	11,145,271
Less accumulated depreciation and amortization	9,941,949	9,819,888
Net fixed assets	1,241,307	1,325,383
Deferred tax assets	603,074	572,655
Marketable securities, long-term	46,558,228	52,838,158
Total assets	87,053,207	87,431,465
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	388,413	414,970
Accrued payroll and other	507,030	574,755
Income taxes payable	720,012
Total current liabilities	1,615,455	989,725
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,842,010 issued and outstanding as of June 30, 2018 and March 31, 2018	48,420	48,420
Additional paid-in capital	19,599,298	19,599,298
Accumulated other comprehensive loss	(1,083,027)	(915,635)
Retained earnings	66,873,061	67,709,657
Total shareholders’ equity	85,437,752	86,441,740
Total liabilities and shareholders’ equity	$ 87,053,207	$ 87,431,465

[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.