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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,605)	$ (14,888)	$ (20,283)
Other comprehensive loss:
Change in unrealized gain (loss) on available for sale investments, net of tax	668	76	(187)
Change in foreign currency translation adjustments, net of tax	(745)	(813)	81
Other comprehensive loss	(77)	(737)	(106)
Total comprehensive loss	$ (9,682)	$ (15,625)	$ (20,389)

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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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