Note 6 - Income Tax (Tables)

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,			June 30,
	2012			2013
Deferred tax liabilities:
Amortization	$	(10,129,938	)	$	(12,900,315	)
Depreciation		(11,685,694	)		(10,450,258	)
Amortized intangibles		(839,560	)		—
Prepaid expense		(430,896	)		(397,865	)
Other		(14,977	)		(14,431	)
Total deferred tax liabilities	$	(23,101,065	)	$	(23,762,869	)
Deferred tax assets:
Federal net operating loss carryforwards	$	4,426,198		$	1,134,998
Amortized intangibles	—				966,773
Alternative minimum credits carryforwards		555,690			720,797
State net operating loss carryforwards		769,262			345,025
Restructuring expense		632,170			1,685,576
Deferred compensation		322,644			304,242
Advance payments		327,718			307,378
Bad debt		704,147			414,742
Other		381,327			218,904
		8,119,156			6,098,435
Less: Valuation allowance		—			(2,107,722	)
Total net deferred tax assets	$	8,119,156		$	3,990,713