Note 2 - Summary of Significant Accounting Policies - Contract Liabilities (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Current contract liabilities, January 1		$ 1,956	$ 4,386
Long-term contract liabilities, January 1	[1]	129	84
Total contract liabilities, January 1		2,085	4,470
Contract additions, net		1,763	1,940
Revenue recognized		(2,016)	(4,123)
Translation		28	(202)
Contract liabilities, December 31		1,860	2,085
Current contract liabilities, December 31		1,668	1,956
Long-term contract liabilities, December 31	[1]	$ 192	$ 129

[1] Long-term contract liabilities are included in Other long-term liabilities on the Consolidated Balance Sheets.