Note 7 - Subsidiary Guarantees (Detail) - Condensed Consolidating Statement of Operations (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues	$ 20,987,909	$ 25,374,241
Operating expenses	(16,099,253)	(18,757,503)
Income	4,888,656	6,616,738
Other income (expense)	(6,734,288)	(5,274,043)
Income	(1,845,632)	1,342,695
Income tax expense	71,611	(524,457)
Net income	(1,774,021)	818,238
Parent [Member]
Revenues	884,619	880,787
Operating expenses	(884,620)	(880,787)
Income	(1)
Other income (expense)	(6,728,279)	(5,266,807)
Earnings from subsidiaries	4,882,648	6,609,502
Income	(1,845,632)	1,342,695
Income tax expense	71,611	(524,457)
Net income	(1,774,021)	818,238
Guarantor Subsidiaries [Member]
Revenues	19,031,627	23,460,360
Operating expenses	(14,480,499)	(16,999,324)
Income	4,551,128	6,461,036
Other income (expense)	(6,007)	(7,229)
Income	4,545,121	6,453,807
Income tax expense	(157,755)
Net income	4,387,366	6,453,807
Non-Guarantor Subsidiaries [Member]
Revenues	1,071,663	1,033,094
Operating expenses	(734,134)	(877,392)
Income	337,529	155,702
Other income (expense)	(2)	(7)
Income	337,527	155,695
Income tax expense	(31,691)
Net income	305,836	155,695
Eliminations [Member]
Earnings from subsidiaries	(4,882,648)	(6,609,502)
Income	(4,882,648)	(6,609,502)
Income tax expense	189,446
Net income	(4,693,202)	(6,609,502)
Consolidated [Member]
Revenues	20,987,909	25,374,241
Operating expenses	(16,099,253)	(18,757,503)
Income	4,888,656	6,616,738
Other income (expense)	(6,734,288)	(5,274,043)
Income	(1,845,632)	1,342,695
Income tax expense	71,611	(524,457)
Net income	$ (1,774,021)	$ 818,238