Balance Sheets (Current Period Unaudited) - USD ($)
Dec. 31, 2016
Mar. 31, 2016
Current assets    
Cash and cash equivalents $ 3,799,188 $ 7,534,593 [1]
Marketable securities, short-term 24,655,206 19,697,384 [1]
Accounts receivable, net of allowance for uncollectible accounts of $15,000 1,461,659 2,244,086 [1]
Inventories 3,162,478 3,205,233 [1]
Prepaid expenses and other assets 751,433 734,524 [1]
Total current assets 33,829,964 33,415,820 [1]
Fixed assets    
Machinery and equipment 9,020,726 8,840,033 [1]
Leasehold improvements 1,559,719 1,539,965 [1]
10,580,445 10,379,998 [1]
Less accumulated depreciation and amortization 9,281,531 8,688,285 [1]
Net fixed assets 1,298,914 1,691,713 [1]
Long-term deferred tax assets 446,949 51,188 [1]
Marketable securities, long-term 59,668,735 65,695,335 [1]
Total assets 95,244,562 100,854,056 [1]
Current liabilities    
Accounts payable 358,530 317,990 [1]
Accrued payroll and other 679,040 556,674 [1]
Deferred revenue 714,805 [1]
Total current liabilities 1,037,570 1,589,469 [1]
Shareholders’ equity    
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,837,010 issued and outstanding as of December 31, 2016 and 4,835,010 issued and outstanding as of March 31, 2016 48,370 48,350 [1]
Additional paid-in capital [1] 19,319,679 19,205,682
Accumulated other comprehensive (loss) income (135,709) 451,359 [1]
Retained earnings 74,974,652 79,559,196 [1]
Total shareholders’ equity 94,206,992 99,264,587 [1]
Total liabilities and shareholders’ equity $ 95,244,562 $ 100,854,056 [1]
[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.