CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ (2,364)	$ 1,299
Adjustments to reconcile net income (loss) to net cash provided by operating activites:
Depreciation	2,275	1,576
Amortization of intangible assets	1,563	1,133
Amortization of capitalized software	456	170
Net accretion of discount and amortization of premium on marketable securities	435	428
Stock-based compensation	6,539	3,855
Deferred income tax provision	687	2,002
Other	248	115
Changes in assets and liabilities:
Accounts receivable, net	(2,976)	(1,883)
Inventory	(200)	29
Other current and noncurrent assets	(794)	(608)
Deferred cost of goods sold	(77)	(340)
Accounts payable	1,006	980
Accrued compensation	1,234	918
Accrued warranty	(14)	(122)
Accrued taxes and fees	891	249
Deferred revenue	(621)	(564)
Other current and noncurrent liabilities	(1,173)	(607)
Net cash provided by operating activities	7,115	8,630
Cash flows from investing activities:
Purchases of property and equipment	(2,118)	(2,553)
Purchase of businesses, net of cash acquired	(23,434)	0
Cost of capitalized software	(708)	(181)
Proceeds from maturity of investments	24,106	21,600
Sales of investments - available for sale	31,299	25,537
Purchase of investments - available for sale	(52,286)	(57,854)
Net cash used in investing activities	(23,141)	(13,451)
Cash flows from financing activities:
Capital lease payments	(200)	(81)
Payment of contingent consideration	(150)	0
Repurchase of common stock	(10,133)	(80)
Proceeds from issuance of common stock under employee stock plans	2,076	1,699
Net cash (used in) provided by financing activities	(8,407)	1,538
Effect of exchange rate changes on cash	118	172
Net decrease in cash and cash equivalents	(24,315)	(3,111)
Cash and cash equivalents at the beginning of the period	53,110	59,159
Cash and cash equivalents at the end of the period	28,795	56,048
Supplemental cash flow information
Income taxes paid	299	93
Interest paid	17	16
Non-cash investing and financing activities
Property and equipment acquired under capital leases	$ 1,510	$ 0