Long-Term Debt And Credit Facilities (Revolving Line Of Credit) (Narrative) (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)
Line of Credit Facility [Line Items]
Cash and cash equivalents	$ 3,618,469	$ 7,270,301	$ 8,724,395	$ 13,775,130
Total liquidity	9,400,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 10,000,000
Line of credit maturity date	Mar. 31, 2018
Minimum tangible net worth requirement, period one	$ (21,500,000)
Minimum tangible net worth requirement, period two	(22,500,000)
Minimum tangible net worth requirement, period three	(23,500,000)
Minimum tangible net worth requirement, period four	(24,500,000)
Line of credit facility, amount outstanding	0
Line of credit facility, current borrowing capacity	$ 5,800,000
Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Liquidity ratio	1.50