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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 486	$ (612)
Other comprehensive income (loss):
Net foreign currency translation loss	(13)	(4)
Change in net unrealized gain on marketable securities	705	138
Tax provision on other comprehensive income (loss)	(160)	0
Other comprehensive income, net of tax	532	134
Comprehensive income (loss)	$ 1,018	$ (478)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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