Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Long-term Debt [Abstract]

Secured Portion of Debt

	December 31,
	2014		2015
Secured bank debt:
(a) ABN AMRO Bank N.V.	$	73,050,000	$	65,350,000
(b) Unicredit Bank AG		16,500,000		16,500,000
(c) Credit Suisse AG		31,650,000		31,650,000
(d) ABN AMRO Bank N.V.		13,750,000		9,750,000
Total	$	134,950,000	$	123,250,000

Current and Non-current portion of Debt

Presented as follows:
Current portion of long-term debt	$	134,950,000	$	123,250,000
Long-term debt		-		-
Total	$	134,950,000	$	123,250,000

Minimum annual principal payments

During the year ending December 31,:
2016	$	13,740,000
2017		109,510,000
Total	$	123,250,000