Note 6 - Long-term Debt and Lease Obligation - Carrying Amount of the Company's Outstanding Debt (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Convertible note instrument due March 5, 2018 Interest accrues at 7% per annum (1)		$ 71,000,000
Lease Obligation		13,720,000	$ 12,755,000
Other loans		160,000	144,000
Debt discount and debt issuance costs, net of accumulated accretion		(8,988,000)	(10,572,000)
Debt, gross		138,452,000	114,831,000
Less current portion		1,408,000	170,000
Debt, non-current		137,044,000	114,661,000
Senior Secured Debt, Due March 25, 2021 [Member]
New Senior secured debt due March 25, 2021 Interest accrues at 8% per annum		62,701,000
Senior Secured Debt, Due September 28, 2019 [Member]
New Senior secured debt due March 25, 2021 Interest accrues at 8% per annum			43,550,000
Convertible Note Instrument, Due March 5, 2018 [Member]
Convertible note instrument due March 5, 2018 Interest accrues at 7% per annum (1)	[1]	1,371,000	2,154,000
Convertible Note Instrument, Due March 5, 2020 [Member]
Convertible note instrument due March 5, 2018 Interest accrues at 7% per annum (1)		$ 69,488,000	$ 66,800,000

[1] As of March 5, 2018, all contervible notes due on March 5, 2018 were converted by certain of the Company's lenders.