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Note 8 - Stockholders' Equity - Changes in Accumulated Other Comprehensive Loss (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Balance, December 31, 2019	$ 75,064
Balance, June 30, 2020	69,835
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance, December 31, 2019	(1,245)
Other comprehensive income (loss)	(138)
Balance, June 30, 2020	(1,383)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance, December 31, 2019	(19)
Other comprehensive income (loss)	18
Balance, June 30, 2020	(1)
AOCI Attributable to Parent [Member]
Balance, December 31, 2019	(1,264)
Other comprehensive income (loss)	(120)
Balance, June 30, 2020	$ (1,384)

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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