Note 11 - Accounts Receivable for Significant Customers (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Accounts Receivable, Net, Current	$ 15,753	$ 8,954
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Accounts Receivable, Net, Current	$ 10,511	$ 3,703
Concentration Risk, Percentage	63.00%	41.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Converted Product Customer 1 [Member]
Accounts Receivable, Net, Current	$ 3,621	$ 3,703
Concentration Risk, Percentage	22.00%	41.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Converted Product Customer 2 [Member]
Accounts Receivable, Net, Current	$ 2,716	$ 0	[1]
Concentration Risk, Percentage	16.00%	0.00%	[1]
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Converted Product Customer 3 [Member]
Accounts Receivable, Net, Current	$ 4,174	$ 0	[1]
Concentration Risk, Percentage	25.00%	0.00%	[1]

[1] Customer did not account for more than 10% of accounts receivable during the period indicated