Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Financial Instruments [Abstract]

Balance Sheet Location

Derivative Instruments designated as hedging instruments
			December 31, 2012		June 30, 2013
	Balance Sheet Location		Fair Value		Fair Value
Interest rate swaps	Current liabilities – Interest rate swaps	$	397,964	$	391,064
Interest rate swaps	Long-term liabilities – Interest rate swaps		253,932		-
Interest rate swaps	Non-current assets – Interest rate swaps		-		(514,014)
Total derivatives		$	651,896	$	(122,950)

Location of Gain/(Loss) Recognized

Derivative Instruments designated as hedging instruments
		Six Months Ended June 30,
	Location of Gain/(Loss) Recognized	2012	2013
Interest rate swaps	Interest and finance costs	(12,510)	(211,203)