Note 10 - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Deferred tax liabilities:
Amortization	$ (16,107,000)	$ (14,871,000)
Depreciation	(10,541,000)	(10,358,000)
Prepaid expense	(415,000)	(600,000)
State net operating loss carryforwards and adjustments, liabilties	(49,000)	0
Other	(13,000)	(14,000)
Total deferred tax liabilities	$ (27,125,000)	(25,843,000)
Deferred tax assets:
Amortized intangibles		502,000
State net operating loss carryforwards and adjustments, assets		27,000
Deferred compensation	$ 234,000	297,000
Advance payments	266,000	286,000
Bad debt	169,000	100,000
Other	350,000	551,000
Total net deferred tax assets	$ 1,019,000	$ 1,763,000