Note 12 - Debt Obligations (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Debt [Table Text Block]

	December 31, 2014		December 31, 2013
	(in thousands)
Convertible Notes, 8.5%, due October 2017, net of discount of ($13.9) million at December 31, 2014 and ($18.3) million at December 31, 2013	$	154,839	$	125,416
Convertible Notes, 6.5%, due March 2015, net of discount of ($0.4) million at December 31, 2014 and ($4.4) million at December 31, 2013		59,473		81,523
		214,312		206,939
Less: Current maturity of long-term debt		214,312		-
Long-term debt, net	$	-	$	206,939

Schedule of Maturities of Long-term Debt [Table Text Block]

2015	$	228,600
2016		-
2017		-
2018		-
2019		-
Thereafter		-
Total scheduled debt maturities	$	228,600

Schedule of Long-term Debt Instruments [Table Text Block]

Year
2015	$	175,880
2016		-
2017		-
Total estimated remaining cash payments related to the 2017 Convertible Notes	$	175,880

Year
2015	$	61,837
Total estimated remaining cash payments related to the 2015 Convertible Notes	$	61,837

Schedule of Convertible Debt Interest Expense [Table Text Block]

	Year Ended December 31,
	2014		2013		2012
	(in thousands)
Interest expense related to the contractual interest coupon	$	13,755	$	3,258	$	-
Amortization of debt discount expense		4,005		959		-
Amortization of debt issue costs		610		135		-
Interest expense related to the 2017 Convertible Notes	$	18,370	$	4,352	$	-

	Year Ended December 31,
	2014		2013		2012
	(in thousands)
Interest expense related to the contractual interest coupon	$	4,386	$	9,622	$	11,111
Amortization of debt discount expense		2,896		6,051		6,698
Amortization of debt issue costs		762		977		956
Interest expense related to the 2015 Convertible Notes	$	8,044	$	16,650	$	18,765

Schedule of Interest Expense [Table Text Block]

	Year Ended December 31,
	2014			2013			2012
	(in thousands)
Interest expense	$	27,920		$	26,016		$	31,719
Capitalized interest expense		(9,250	)		(9,858	)		(15,604	)
Interest expense, net	$	18,670		$	16,158		$	16,115