Statements of Comprehensive Income (Unaudited) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Net income | $ 3,421,405 | $ 3,571,602 | $ 11,649,064 | $ 10,030,252 |
| Unrealized gain (loss) from marketable securities, net of tax | 101,891 | (295,458) | 46,101 | (227,693) |
| Comprehensive income | $ 3,523,296 | $ 3,276,144 | $ 11,695,165 | $ 9,802,559 |