XML 45 R33.htm IDEA: XBRL DOCUMENT v3.19.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents and Restricted Cash (Narrative) (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Restricted cash $ 2,500,000 $ 4,000,000
Bulk Nordic Odin, Bulk Nordic Olympic, Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Loan Agreement    
Debt Instrument [Line Items]    
Restricted cash $ 2,500,000 2,500,000
Senior Secured Post-Delivery Term Loan Facility    
Debt Instrument [Line Items]    
Restricted cash   $ 1,500,000