SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Concentration of credit risk (Details)	12 Months Ended
	Dec. 31, 2013 Institution	Dec. 31, 2012 Institution	Dec. 31, 2011
Concentration of credit risk
Percentage of revenue earned (in hundredths)	100.00%	100.00%	100.00%
Number of financial institutions with which entity maintains its cash and cash equivalents	1	1
Revenue [Member]
Concentration of credit risk
Number of customers	11	11	8
Number of major customers	3	4	4
Concentration risk percentage (in hundredths)	10.00%
Revenue [Member] | Cargill International S.A [Member]
Concentration of credit risk
Concentration risk percentage (in hundredths)	40.17%	44.41%	44.99%
Revenue [Member] | Resource Marine PTE Ltd [Member]
Concentration of credit risk
Concentration risk percentage (in hundredths)	19.15%	13.90%	13.70%
Revenue [Member] | AMN Bulkcarriers Inc [Member]
Concentration of credit risk
Concentration risk percentage (in hundredths)			11.19%
Revenue [Member] | Swissmarine Services S.A [Member]
Concentration of credit risk
Concentration risk percentage (in hundredths)	17.80%	10.04%	10.61%
Revenue [Member] | Klaveness Charterering [Member]
Concentration of credit risk
Concentration risk percentage (in hundredths)		11.79%