Commitments and Contingencies (Tables)

3 Months Ended

Jun. 30, 2019

Commitments and Contingencies

Schedule of future minimum scrubber purchases commitments

	June 30, 2019
Less than one year	$	9,955,572
Total	$	9,955,572

Schedule of commitments under contracts for BWMS Purchases

	June 30, 2019
Less than one year	$	703,360
Total	$	703,360

Schedule of operating lease rent expense

	Three months ended
	June 30, 2019		June 30, 2018
Operating lease rent expense	$	122,352	$	127,482

Schedule of operating leases

	June 30, 2019
Less than one year	$	410,667
One to three years		429,227
Total	$	839,894

Schedule of time charter-in expenses

	Three months ended
	June 30, 2019		June 30, 2018
Charter hire expenses	$	2,055,000	$	—

Schedule of future minimum time charter-in commitments

	June 30, 2019
Less than one year	$	5,480,000
Total	$	5,480,000

Schedule of future minimum fixed time charter contracts

	June 30, 2019
Less than one year	$	23,993,113
One to three years		22,293,252
Total	$	46,286,365