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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Cash flows from operating activities: |  |
Net loss | $ (13,357) | $ (16,523)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Allowance for doubtful accounts and other | (85) | (25)
Provision for excess and obsolete inventories | 330 | 327
Non-cash lease expense | 291 | 458
Depreciation and amortization | 752 | 962
Stock-based compensation | 2,279 | 2,101
Amortization of premium on investments | 59 | 49
Changes in assets and liabilities: |  |
Accounts receivable | 702 | 2,343
Inventory | (723) | (568)
Prepaid expenses and other assets | (870) | (56)
Accounts payable | 792 | 1,238
Accrued expenses and other liabilities | (112) | (1,693)
Net cash used in operating activities | (9,942) | (11,387)
Cash flows from investing activities: |  |
Purchase of investments | (7,163) | (17,509)
Maturities of short-term investments | 7,384 | 17,250
Purchases of property and equipment | (541) | (122)
Net cash used in investing activities | (320) | (381)
Cash flows from financing activities: |  |
Proceeds from issuance of common stock under employee stock plans | 2,353 | 3,326
Net cash provided by financing activities | 2,353 | 3,326
Net decrease in cash and cash equivalents | (7,909) | (8,442)
Cash and cash equivalents at beginning of the period | 44,234 | 51,506
Cash and cash equivalents at end of the period | 36,325 | 43,064
Non-cash investing and financing activities: |  |
Purchases of property and equipment through accounts payable and accruals | 26 | 9
Operating lease right-of-use assets exchanged for lease obligations | 174 | 658
Supplemental cash flow information: |  |
Net cash paid for income taxes | $ 54 | $ 857

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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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