Note 8 - Financing Arrangements (Tables)

6 Months Ended

Jun. 30, 2014

Debt Disclosure [Abstract]

Carrying Amount of Liability Component and Remaining Unamortized Debt Discount [Table Text Block]

	JUNE 30, 2014		DECEMBER 31, 2013
Carrying amount of equity component	$	20,470	$	20,470
Carrying amount of the liability component		110,920		108,750
Unamortized discount of the liability component		9,080		11,250
Unamortized deferred financing costs		1,642		2,034

Expenses in Relation to Convertible Notes [Table Text Block]

	Three months ended June 30,				Six months ended June 30,
Expense Description	2014		2013		2014		2013
Interest expense at 3.5% coupon rate (1)	$	1,050	$	1,050	$	2,100	$	2,100
Debt discount amortization (1)		1,095		1,019		2,170		2,020
Amortization of deferred financing costs		198		184		392		365
	$	2,343	$	2,253	$	4,662	$	4,485

Schedule of Guarantor Obligations [Table Text Block]

Fixed Charge Coverage Ratio	Revolver ABR Spread	Revolver Eurodollar Spread
Category 1 > 1.50 to 1.0	0.50%	1.50%
Category 2 > 1.25 to 1.00 but < 1.50 to 1.00	0.75%	1.75%
Category 3 < 1.25 to 1.00	1.00%	2.00%