CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 2,779	$ 2,987
Adjustments to reconcile net income to net cash provided by operating activites:
Depreciation and amortization	790	599
Stock-based compensation	595	129
Change in fair value of warrant liability	0	(167)
Deferred income tax benefit	(336)	0
Other	37	34
Changes in assets and liabilities:
Accounts receivable, net	(438)	(268)
Inventory	1,491	634
Other current and noncurrent assets	153	(134)
Deferred cost of goods sold	(14)	(2)
Accounts payable	(1,737)	782
Accrued compensation	(366)	197
Accrued warranty	29	49
Accrued taxes and fees	(127)	268
Deferred revenue	235	203
Other current and noncurrent liabilities	151	(1,017)
Net cash provided by operating activities	3,242	4,294
Cash flows from investing activities:
Purchases of property and equipment	(1,211)	(1,080)
Purchase of strategic investment	0	(315)
Acquisition of businesses, net of cash acquired	(713)	(998)
Sale of property and equipment	0	1
Net cash used in investing activities	(1,924)	(2,392)
Cash flows from financing activities:
Capital lease payments	(247)	(18)
Repurchase of common stock	(1,038)	(2,700)
Proceeds from issuance of common stock	0	278
Proceeds from issuance of common stock under employee stock plans	693	357
Net cash used in financing activities	(592)	(2,083)
Net increase (decrease) in cash and cash equivalents	726	(181)
Cash and cash equivalents at the beginning of the period	16,474	18,056
Cash and cash equivalents at the end of the period	17,200	17,875
Supplemental cash flow information
Issuance of common stock in connection with acquisitions of businesses	29,125	600
Acquisition of net assets in connection with acquisitions of businesses	372	80
Acquisition of capital lease in connection with acquisitions of businesses	297	0
Transfer of net assets in purchase of strategic investment	$ 0	$ 41