Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 13,268	$ (3,605)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation and amortization	15,711	14,593
Share-based compensation expense	12,510	17,062
Provision (recovery) for doubtful accounts	(313)	(236)
Gain on disposal of property and equipment	(351)	(159)
Foreign currency transaction losses, net	2,235	20,113
Amortization of discounts and premiums on investments	(6)	76
Amortization of debt issuance cost	546	546
Deferred income taxes, net	62	(6,522)
Net changes in operating assets and liabilities
Accounts receivable and unbilled receivable	4,221	(1,975)
Prepaid expenses and other current assets	(7,735)	(11,238)
Other long-term assets	(12,673)	(4,009)
Accounts payable	(8,298)	232
Accrued employee compensation and benefits	(4,744)	(5,834)
Accrued expenses and other current liabilities	11,382	11,179
Operating lease liabilities	141
Income taxes payable	(2,748)	3,133
Other long-term liabilities	596	(73)
Net cash provided by operating activities	23,804	33,283
Cash flows from investing activities:
Proceeds from sale of property and equipment	651	451
Purchase of short-term investments	(20,279)	(68,803)
Proceeds from sale or maturity of short-term investments	38,240	60,571
Payments for asset acquisitions	(7,251)
Payment of deferred consideration related to business acquisition	(17,500)
Business acquisition, net of cash acquired		(34)
Purchase of property and equipment	(8,479)	(18,875)
Net cash used in investing activities	(14,618)	(26,690)
Cash flows from financing activities:
Proceeds from debt	27,500
Proceeds from revolving credit facility		32,000
Payment of debt	(6,250)	(6,250)
Repurchase of common stock	(18,680)
Payments of withholding taxes related to net share settlements of restricted stock	(3,658)	(7,602)
Purchase of redeemable noncontrolling interest related to Polaris	(8,675)	(28,396)
Principal payments on capital lease obligation	(32)	(43)
Payment of contingent consideration related to acquisitions		(100)
Payment of dividend on Series A Convertible Preferred Stock	(2,092)	(2,092)
Net cash used in financing activities	(11,600)	(11,729)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(4,012)	(11,694)
Net decrease in cash and cash equivalents and restricted cash	(6,426)	(16,830)
Cash, cash equivalents and restricted cash, beginning of year	190,113	195,236
Cash, cash equivalents and restricted cash, end of period	183,687	178,406
Parent
Cash flows from financing activities:
Proceeds from exercise of common stock options	194	428
Subsidiaries
Cash flows from financing activities:
Proceeds from exercise of common stock options	$ 93	$ 326