UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities
Net (loss) income	$ (305)	$ 10,689
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation	587	610
Amortization of intangible assets	152	188
Stock-based compensation	459	330
Amortization of debt issue costs	122	121
Impairment of intangible assets		3
Loss on sale of property and equipment	6
Provision for inventory reserves	112	119
Other	4	23
Changes in operating assets and liabilities:
Accounts receivable, current and long-term	(5,909)	(12,192)
Revenue earned but not billed	(2,674)	(454)
Inventories	(3,723)	(4,354)
Prepaid expenses and other assets	206	10
Accounts payable	(6,305)	12,654
Accrued expenses and other	3,058	749
Deferred revenue, current and long-term	72	(47)
Net cash (used in) provided by operating activities	(14,138)	8,449
Investing activities
Purchases of property and equipment	(397)	(461)
Additions to patents and licenses	(30)	(73)
Net cash used in investing activities	(427)	(534)
Financing activities
Payment of long-term debt	(28)	(44)
Proceeds from revolving credit facility	8,000	62,200
Payments of revolving credit facility	(10,085)	(67,646)
Payments to settle employee tax withholdings on stock-based compensation	(20)	(72)
Net proceeds from employee equity exercises	71	16
Net cash used in financing activities	(2,062)	(5,546)
Net (decrease) increase in cash and cash equivalents	(16,627)	2,369
Cash and cash equivalents at beginning of period	28,751	8,729
Cash and cash equivalents at end of period	12,124	$ 11,098
Supplemental disclosure of non-cash investing and financing activities:
Operating lease assets obtained in exchange for new operating lease liabilities	$ 355