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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |
Net loss | $ (16,523) | $ (6,513)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Allowance for doubtful accounts and other | (25) | (32)
Provision for excess and obsolete inventories | 327 | 260
Non-cash lease expense | 458 | 462
Depreciation and amortization | 962 | 1,079
Stock-based compensation | 2,101 | 1,922
Amortization of premium (discount) on investments | 49 | (14)
Changes in assets and liabilities: |  |
Accounts receivable | 2,343 | 1,973
Inventory | (568) | 904
Prepaid expenses and other assets | (56) | (1,064)
Accounts payable | 1,238 | (728)
Accrued expenses and other liabilities | (1,693) | 531
Net cash used in operating activities | (11,387) | (1,220)
Cash flows from investing activities: |  |
Purchase of investments | (17,509) | (15,866)
Maturities of short-term investments | 17,250 | 18,626
Decrease in MikaMonu escrow deposit |  | 1,000
Purchases of property and equipment | (122) | (265)
Net cash provided by (used in) investing activities | (381) | 3,495
Cash flows from financing activities: |  |
Payment of MikaMonu escrow deposit |  | (428)
Proceeds from issuance of common stock under employee stock plans | 3,326 | 3,629
Net cash provided by financing activities | 3,326 | 3,201
Net increase (decrease) in cash and cash equivalents | (8,442) | 5,476
Cash and cash equivalents at beginning of the period | 51,506 | 42,495
Cash and cash equivalents at end of the period | 43,064 | 47,971
Non-cash financing activities: |  |
Purchases of property and equipment through accounts payable and accruals | 9 | 24
Operating lease right-of-use assets exchanged for lease obligations | 658 | 1,228
Supplemental cash flow information: |  |
Net cash paid for income taxes | $ 857 | $ 310

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