Long-Term Debt And Credit Facilities (Schedule Of Long-Term Debt Outstanding) (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total debt, Carrying Amount	$ 29,128,740	$ 38,463,852
Total debt, Estimated Fair Value	29,248,706	38,544,405
Less current maturities, Carrying Amount	(13,891,182)	(21,173,321)
Less current maturities, Estimated Fair Value	(14,011,148)	(21,253,874)
Total long term debt, Carrying Amount	15,237,558	17,290,531
Total long term debt, Estimated Fair Value	15,237,558	17,290,531
Revolving Credit Agreement, Due March 2013 [Member]
Debt Instrument [Line Items]
Total debt, Carrying Amount	8,000,000	15,290,510
Total debt, Estimated Fair Value	8,119,966	15,371,063
Term Note, Due December 2013 [Member]
Debt Instrument [Line Items]
Total debt, Carrying Amount	6,000,000	8,000,000
Total debt, Estimated Fair Value	6,000,000	8,000,000
Cowen Debt [Member]
Debt Instrument [Line Items]
Total debt, Carrying Amount	14,075,189	15,173,342
Total debt, Estimated Fair Value	14,075,189	15,173,342
Subordinated Convertible Debentures [Member]
Debt Instrument [Line Items]
Total debt, Carrying Amount	1,053,551
Total debt, Estimated Fair Value	$ 1,053,551