Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2019		Jun. 30, 2018
OPERATING ACTIVITIES
Net income	$ 3,607,419		$ 3,945,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	134,733		179,746
Deferred income taxes	(664)		(443)
Changes in operating assets and liabilities:
Accounts receivable	248,955		(231,994)
Inventories	45,093		28,758
Prepaid expenses and other assets	205,399		103,053
Accounts payable and other liabilities	296,693		625,730
Net cash provided by operating activities	4,537,628		4,649,899
INVESTING ACTIVITIES
Purchases of fixed assets	(16,100)		(37,985)
Purchases of marketable securities	(3,013,530)		(3,373,125)
Proceeds from maturities of marketable securities	9,500,000		7,300,000
Cash provided by investing activities	6,470,370		3,888,890
FINANCING ACTIVITIES
Payment of dividends to shareholders	(4,846,010)		(4,842,010)
Cash used in financing activities	(4,846,010)		(4,842,010)
Increase in cash and cash equivalents	6,161,988		3,696,779
Cash and cash equivalents at beginning of period	6,877,304	[1]	4,755,082
Cash and cash equivalents at end of period	13,039,292		8,451,861
Supplemental disclosures of cash flow information:
Cash paid during the period for income taxes			$ 11,222

[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.