Note 24 - Segment information (Details) - Net Sales by Geographic Location (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Note 24 - Segment information (Details) - Net Sales by Geographic Location [Line Items]
Net sales	$ 91,642	[1]	$ 42,629	[1]
UNITED STATES
Note 24 - Segment information (Details) - Net Sales by Geographic Location [Line Items]
Net sales	14,690	[1]	25,347	[1]
GREECE
Note 24 - Segment information (Details) - Net Sales by Geographic Location [Line Items]
Net sales	526	[1]	13,854	[1]
ITALY
Note 24 - Segment information (Details) - Net Sales by Geographic Location [Line Items]
Net sales		[1]	3,428	[1]
CHINA
Note 24 - Segment information (Details) - Net Sales by Geographic Location [Line Items]
Net sales	$ 76,426	[1]		[1]

[1] Sales are attributed to countries based on location of customer.