Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 5,494	$ 3,019
Adjustments to reconcile net income to net cash provided by (used in) operating activities, net of assets acquired and liabilities assumed:
Depreciation and amortization	2,411	2,832
Provision for receivable allowances	2,428	1,610
Net change in inventory provision	383	425
Stock-based compensation	907	855
Gain on investments	(431)	(169)
Foreign currency adjustments on intercompany amounts and other non-cash items	69	(111)
Changes in operating assets and liabilities, net of business acquired:
Accounts receivable	(2,553)	(4,652)
Inventories	(636)	2,083
Prepaid expenses and other assets	(2,282)	130
Accounts payable	(1,468)	559
Accrued expenses and other liabilities	(4,533)	1,113
Pension liabilities	(206)	(198)
Net cash provided by (used in) operating activities	(417)	7,496
Cash flows from investing activities:
Purchases of investments	(2,203)
Purchases of plant and equipment	(2,144)	(3,477)
Net cash used in investing activities	(4,347)	(3,477)
Cash flows from financing activities:
Repayments of loans and notes payable	(278)	(7,970)
Proceeds from employee equity plans	5,212	694
Net cash provided by (used in) financing activities	4,934	(7,276)
Effect of exchange rate fluctuations on cash and cash equivalents	3,028	(1,161)
Net increase (decrease) in cash and cash equivalents	3,198	(4,418)
Cash and cash equivalents and restricted cash at beginning of period (1)	169,234	156,083
Cash and cash equivalents and restricted cash at end of period (2)	$ 172,432	$ 151,665