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Note 17 - Fair Value Measurements (Detail) - Fair Value Long-term Debt (USD $)	Dec. 31, 2012
Notes payable	$ 270,990,023
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Notes payable	269,660,531
Estimate of Fair Value, Fair Value Disclosure [Member]
Notes payable	$ 171,841,824

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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