UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net (loss) income	$ (5,166)	$ 6,169
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation	663	622
Amortization of intangible assets	104	113
Stock-based compensation	987	372
Amortization of debt issue costs	31	31
Deferred income tax	(1,620)	2,075
Gain (loss) on sale of property and equipment	10	(15)
Provision for inventory reserves	175	313
Provision for bad debts	20	8
Other	117	0
Changes in operating assets and liabilities:
Accounts receivable	233	(9,972)
Revenue earned but not billed	1,075	722
Inventories	2,808	(495)
Prepaid expenses and other assets	448	1,015
Accounts payable	(3,954)	(633)
Accrued expenses and other	(2,486)	(2,208)
Deferred revenue, current and long-term	(40)	(43)
Net cash used in operating activities	(6,595)	(3,956)
Investing activities
Cash to fund acquisition	55	0
Cash paid for investment	0	(500)
Purchases of property and equipment	(442)	(312)
Additions to patents and licenses	(10)	(7)
Proceeds from sale of property, plant and equipment	0	17
Net cash used in investing activities	(397)	(802)
Financing activities
Payment of long-term debt	(8)	(7)
Proceeds from revolving credit facility	5,000	0
Payments of revolving credit facility	0	0
Payments to settle employee tax withholdings on stock-based compensation	(2)	(6)
Deferred financing costs	0	(5)
Net proceeds from employee equity exercises	56	123
Net cash provided by financing activities	5,046	105
Net decrease in cash and cash equivalents	(1,946)	(4,653)
Cash and cash equivalents at beginning of period	14,466	19,393
Cash and cash equivalents at end of period	$ 12,520	$ 14,740