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Note 3 - Supplemental Balance Sheet Information (in Thousands) - Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts receivable	$ 46,970	$ 36,306
Less allowance for doubtful accounts	(533)	(342)
Accounts Receivable, net	46,142	35,964
Trade Accounts Receivable [Member]
Accounts receivable	34,824	29,437
Unbilled [Member]
Accounts receivable	8,305	5,863
Non-Trade [Member]
Accounts receivable	$ 3,546	$ 1,006

X

- Definition

Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

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