Note 19 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Leases, Rent Expense, Net	$ 130	$ 225	$ 225
Depreciation	548	$ 429	$ 423
Operating Lease Termination [Member]
Lease Termination Fees Paid	125
Operating Leases, Rent Expense, Net	17
Operating Lease Termination [Member] | Leasehold Improvements [Member]
Depreciation	30
Alloy Purchase Commitments [Member]
Long-term Purchase Commitment, Amount	$ 308