Note 4 - Other Financial Information - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 01, 2016	Dec. 31, 2015
Interest receivable		$ 272	$ 4
Foreign currency put options			33
Supplier advances		73	171
Other prepaid expenses and current assets		966	735
Total prepaid and other current assets	$ 1,311	$ 1,311	$ 943