Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income		$ 8,957	$ 6,954
Adjustments to reconcile net income to net cash provided by operating activities, net of assets acquired and liabilities assumed:
Depreciation and amortization		5,046	5,367
Provision for receivable allowances		5,580	4,517
Net change in inventory provision		1,442	593
Stock-based compensation		2,005	1,729
Gain on investments		(744)	(552)
Foreign currency adjustments on intercompany amounts and other non-cash items		62	(79)
Changes in operating assets and liabilities, net of business acquired:
Accounts receivable		(4,846)	(5,242)
Inventories		(3,378)	(2,112)
Prepaid expenses and other assets		(3,320)	(326)
Accounts payable		508	(86)
Accrued expenses and other liabilities		(4,504)	3,021
Pension liabilities		(419)	(386)
Net cash provided by operating activities		6,389	13,398
Cash flows from investing activities:
Cash acquired on acquisition		69
Purchases of investments		(9,115)	(2,000)
Purchases of plant and equipment		(6,030)	(5,156)
Proceeds from sale of investments			805
Net cash used in investing activities		(15,076)	(6,351)
Cash flows from financing activities:
Repayments of loans and notes payable		(1,009)	(8,229)
Proceeds from employee equity plans		6,097	1,355
Payment of cash dividends to stockholders			(1,258)
Net cash provided by (used in) financing activities		5,088	(8,132)
Effect of exchange rate fluctuations on cash and cash equivalents		4,606	(920)
Net increase (decrease) in cash and cash equivalents		1,007	(2,005)
Cash and cash equivalents and restricted cash at beginning of period (1)	[1]	169,234	156,083
Cash and cash equivalents and restricted cash at end of period (2)	[2]	$ 170,241	$ 154,078

[1] Includes restricted cash of $1.3 million and $277,000 as of March 31, 2017 and 2016, respectively.

[2] Includes restricted cash of $1.5 million and $274,000 as of September 30, 2017 and 2016, respectively.