Note 6 - Long-Term Debt (Detail) - Tranches in connection with Term Loan (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Convertible Term Loan Principal Amount	$ 65,262	$ 56,673
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	1,898,620
Tranche A-1 [Member]
Convertible Term Loan Principal Amount	4,550
Convertible Term Loan Conversion Price (in Dollars per share)	$ 7.00
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	650,000
Tranche A-2a [Member]
Convertible Term Loan Principal Amount	2,411
Convertible Term Loan Conversion Price (in Dollars per share)	$ 35.00
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	68,889
Tranche A-2b [Member]
Convertible Term Loan Principal Amount	7,419
Tranche B-1 [Member]
Convertible Term Loan Principal Amount	2,856
Convertible Term Loan Conversion Price (in Dollars per share)	$ 13.50
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	211,565
Tranche B-2 [Member]
Convertible Term Loan Principal Amount	2,190
Convertible Term Loan Conversion Price (in Dollars per share)	$ 12.50
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	175,239
Tranche B-3a [Member]
Convertible Term Loan Principal Amount	6,810
Convertible Term Loan Conversion Price (in Dollars per share)	$ 35.00
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	194,558
Tranche B-3b [Member]
Convertible Term Loan Principal Amount	26,072
Tranche C-1 [Member]
Convertible Term Loan Principal Amount	5,712
Convertible Term Loan Conversion Price (in Dollars per share)	$ 13.50
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	423,130
Tranche C-2 [Member]
Convertible Term Loan Principal Amount	2,190
Convertible Term Loan Conversion Price (in Dollars per share)	$ 12.50
Convertible Term Loan Potential Number of Shares Issuable (in Shares)	175,239
Tranche D [Member]
Convertible Term Loan Principal Amount	$ 5,052