CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (6,513)	$ 265
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Allowance for doubtful accounts and other	(32)	40
Provision for excess and obsolete inventories	260	874
Non-cash lease expense	462
Depreciation and amortization	1,079	1,073
Stock-based compensation	1,922	1,686
Amortization of premium on investments	(14)	(25)
Changes in assets and liabilities:
Accounts receivable	1,973	(2,921)
Inventory	904	(1,276)
Prepaid expenses and other assets	(1,064)	(219)
Accounts payable	(728)	532
Accrued expenses and other liabilities	531	768
Net cash provided by (used in) operating activities	(1,220)	797
Cash flows from investing activities:
Purchase of investments	(15,866)	(16,057)
Maturities of short-term investments	18,626	15,423
Decrease in MikaMonu escrow deposit	1,000	750
Purchases of property and equipment	(265)	(1,948)
Net cash provided by (used in) investing activities	3,495	(1,832)
Cash flows from financing activities:
Payment of contingent consideration		(720)
Payment of MikaMonu escrow deposit	(428)	(364)
Repurchase of common stock		(102)
Proceeds from issuance of common stock under employee stock plans	3,629	2,509
Net cash provided by financing activities	3,201	1,323
Net increase in cash and cash equivalents	5,476	288
Cash and cash equivalents at beginning of the period	42,495	40,241
Cash and cash equivalents at end of the period	47,971	40,529
Non-cash financing activities:
Purchases of property and equipment through accounts payable and accruals	24	34
Supplemental cash flow information:
Net cash paid for income taxes	$ 310	$ 11