Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 3,463	$ 3,935	$ 8,957	$ 6,954
Foreign currency translation adjustments	3,795	436	10,677	(2,388)
Changes in market value of investments:
Changes in unrealized gains (losses), net of income taxes of $(84) and $(92) for the three and six months ended September 30, 2017, respectively, and net of income taxes of $31 and $76 for the three and six months ended September 30, 2016, respectively	(125)	47	(138)	132
Reclassification adjustment for net losses realized in net income, net of income taxes of $(80) and $(19) for the three and six months ended September 30, 2016, respectively		(121)		(31)
Net change in market value of investments	(125)	(74)	(138)	101
Total comprehensive income	$ 7,133	$ 4,297	$ 19,496	$ 4,667