Note 2 - Contracts With Customers - Information About Receivables, Contract Assets, and Contract Liabilities From Contracts With Customers (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Accounts receivables	$ 19,882		$ 11,639
Deferred Revenue	(16,275)		(16,354)
Revenue recognized that was included in deferred revenue at beginning of year due to completion of services	(11,934)	$ (12,226)
Increases due to invoicing of client, net of amounts recognized as revenue	11,821	12,751
Decreases due to completion of services (or portion of services) and transferred to accounts receivable	(85)	(46)
Change due to cumulative catch-up adjustments arising from changes in expected contract consideration	34	219
Increases due to revenue recognized in the period with additional performance obligations before invoicing	102	$ 223
Other Current Assets [Member]
Contract assets included in other current assets	$ 120		$ 103