Note 7 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	December 31, 2019								December 31, 2018
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Assets:
Other assets:
Interest rate swaps	$	-	$	-	$	-	$	-	$	458	$	-	$	458	$	-
Liabilities:
Other long-term liabilities:
Interest rate swaps	$	288	$	-	$	288	$	-	$	-	$	-	$	-	$	-

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

		Notional		Fair
	Balance Sheet Location	Amount		Value
At December 31, 2019:
Interest rate swaps	Other long-term liabilities	$	133,313	$	288
At December 31, 2018:
Interest rate swaps	Other assets	$	90,000	$	458

Derivative Instruments, Gain (Loss) [Table Text Block]

	2019			2018
(Loss) gain recognized in accumulated other comprehensive loss	$	(40	)	$	387
Gain reclassified from accumulated other comprehensive loss	$	706		$	444

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	2019			2018
Asset at January 1	$	458		$	515
Reclassified from other assets and other long-term liabilities to accumulated other comprehensive loss		(40	)		387
Change in fair value credited to interest expense		(706	)		(444	)
(Liability) asset at December 31	$	(288	)	$	458

Effect of Cash Flow Hedge Accounting on the Statement of Operations [Table Text Block]

	2019			2018
Recorded as Interest Expense:
Hedged interest payments	$	(7,698	)	$	(6,370	)
Gain on interest rate swaps		706			444

Schedule of Carrying Value of Assets and Liabilities [Table Text Block]

	2019		2018
IRU Assets	$	1,964	$	2,041
IRU Obligations		3,441		3,594