CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net loss	$ (7,204)	$ (8,776)
Adjustments to reconcile net loss to net cash used in operating activities:
Allowance for doubtful accounts and other	(10)	(80)
Provision for excess and obsolete inventories	89	265
Non-cash lease expense	281	206
Change in fair value of contingent consideration	(830)	45
Depreciation and amortization	510	501
Stock-based compensation	1,299	1,539
Amortization of premium on investments	12	45
Changes in assets and liabilities:
Accounts receivable	(291)	92
Inventories	(966)	(371)
Prepaid expenses and other assets	(81)	(416)
Accounts payable	205	165
Accrued expenses and other liabilities	(1,387)	(593)
Net cash used in operating activities	(8,373)	(7,378)
Cash flows from investing activities:
Purchase of investments		(3,250)
Maturities of short-term investments	4,250	6,133
Purchases of property and equipment	(224)	(393)
Net cash provided by investing activities	4,026	2,490
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock plans	179	1,597
Net cash provided by financing activities	179	1,597
Net decrease in cash and cash equivalents	(4,168)	(3,291)
Cash and cash equivalents at beginning of the period	36,971	44,234
Cash and cash equivalents at end of the period	32,803	40,943
Non-cash investing and financing activities:
Purchases of property and equipment through accounts payable and accruals		4
Operating lease right-of-use assets exchanged for lease obligations	376
Supplemental cash flow information:
Net cash paid for income taxes	$ 82	$ 25