Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss		$ (6,179)	$ (3,893)
Other comprehensive income, net of tax:
Unrealized gain on available-for-sale securities		0	1
Foreign currency translation adjustment		1,080	2,444
Unrealized gain on derivative instruments, net		8	22
Other comprehensive income, net of tax	[1]	1,088	2,467
Total comprehensive loss		$ (5,091)	$ (1,426)

[1] Tax impact was nominal for all periods.