Note 10 - Debt (Details) - Estimated Remaining Cash Payments (USD $) In Thousands, unless otherwise specified	1 Months Ended	6 Months Ended
	May 31, 2012	Jun. 30, 2013	Jun. 30, 2012
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	$ 40,000	$ 46,139	$ 44,735
Year One [Member] | Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		5,556
Year One [Member] | $40 Million Secured Debt Facility [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		9,574
Year Two [Member] | Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		11,111
Year Two [Member] | $40 Million Secured Debt Facility [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		25,069
Year Three [Member] | Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		176,493
Year Three [Member] | $40 Million Secured Debt Facility [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		9,186
Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		193,160
$40 Million Secured Debt Facility [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments		$ 43,829