Earnings Per Share ("EPS") (Details) - USD ($)	3 Months Ended				6 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income	$ 14,101,803	$ 5,869,100	$ 537,950	$ 12,168,005	$ 19,970,903	$ 12,705,955
Denominator:
Basic weighted average number of common shares outstanding (in shares)	40,011,505		50,711,714		40,475,625	50,632,392
Effect of dilutive restricted stock and restricted stock units (in shares)	103,437		42,793		163,448	83,785
Diluted weighted average number of common shares outstanding (in shares)	40,114,942		50,754,507		40,639,073	50,716,177
EPS:
Earnings per common share - basic (in dollars per share)	$ 0.35		$ 0.01		$ 0.49	$ 0.25
Earnings per common share - diluted (in dollars per share)	$ 0.35		$ 0.01		$ 0.49	$ 0.25
Restricted stock awards
EPS:
Number of shares excluded from the calculation of diluted EPS	0		0		0	0