Note 9 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating losses	$ 16,064	$ 14,965
Accruals not currently deductible	12,901	11,020
Bad debts	1,166	1,123
Foreign tax credits	1,653	1,653
Other	4,135	4,745
Total deferred tax assets	35,919	33,506
Valuation allowance	(15,024)	(13,834)
Total deferred tax assets, net of allowances	20,895	19,672
Deferred tax liabilities:
Accelerated depreciation and amortization	(29,530)	(30,407)
Other	(7,776)	(12,477)
Total deferred tax liabilities	(37,306)	(42,884)
Total net deferred tax liability	(16,411)	(23,212)
Current portion of deferred tax assets	11,272	11,251
Non current portion of deferred tax assets	119	274
Current portion of deferred tax liabilities	(742)	(518)
Non current portion of deferred tax liabilities	(27,060)	(34,219)
Net deferred tax liabilities	$ (16,411)	$ (23,212)