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Leases - The Company as Lessee - Schedule of total amount of lease payments on an undiscounted basis (Detail)
Dec. 31, 2019
USD ($)
Discount rate upon adoption 5.60%
2020 $ 478,140
Lessee, Operating Lease, Liability, Payments, Due 478,140
Operating Lease, Liability 473,132
Lease liabilities - short term 473,132
Total lease liabilities 473,132
Discount based on incremental borrowing rate $ 5,008
Chartered-in contract greater than 12 months [Member]  
Discount rate upon adoption 5.60%
2020 $ 390,000
Lessee, Operating Lease, Liability, Payments, Due 390,000
Operating Lease, Liability 386,388
Lease liabilities - short term 386,388
Total lease liabilities 386,388
Discount based on incremental borrowing rate $ 3,612
Office leases [Member]  
Discount rate upon adoption 5.60%
2020 $ 88,140
Lessee, Operating Lease, Liability, Payments, Due 88,140
Operating Lease, Liability 86,744
Lease liabilities - short term 86,744
Total lease liabilities 86,744
Discount based on incremental borrowing rate $ 1,396