Statements of Comprehensive Income - USD ($)	12 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net income	$ 12,948,869	$ 12,292,315	$ 14,368,354
Unrealized loss from marketable securities, net of tax	(489,657)	(295,088)	(131,410)
Comprehensive income	$ 12,459,212	$ 11,997,227	$ 14,236,944

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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