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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Cash flows from operating activities: |  |
Net loss | $ (13,093) | $ (5,146)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Deferred income tax benefit | (34) | (14)
Rental equipment depreciation | 9,269 | 6,121
Property, plant and equipment depreciation | 2,057 | 2,003
Amortization of intangible assets | 866 | 795
Amortization of premiums on short-term investments |  | (9)
Stock-based compensation expense | 1,123 | 1,194
Bad debt expense (recovery) | 8,151 | (30)
Inventory obsolescence expense | 1,966 | 2,401
Change in estimated fair value of contingent consideration | 972 |
Gross profit from sale of used rental equipment | (425) | (200)
Gain on disposal of property, plant and equipment | (153) |
Realized loss on short-term investments |  | 67
Effects of changes in operating assets and liabilities: |  |
Trade accounts and other receivables | (771) | (5,806)
Inventories | 1,760 | (3,695)
Deferred cost of revenue and other assets | (8,440) | (1,021)
Accounts payable trade | 871 | 3,018
Deferred revenue and other liabilities | 1,607 | (2,582)
Net cash provided by (used in) operating activities | 5,726 | (2,904)
Cash flows from investing activities: |  |
Purchase of property, plant and equipment | (2,785) | (962)
Proceeds from the sale of property, plant and equipment | 180 |
Investment in rental equipment | (5,238) | (20,420)
Proceeds from the sale of used rental equipment | 2,100 | 1,646
Proceeds from the sale of short-term investments |  | 24,856
Business acquisition |  | (1,819)
Payments for damages related to insurance claim |  | (616)
Proceeds from insurance claim |  | 1,166
Net cash provided by (used in) investing activities | (5,743) | 3,851
Cash flows from financing activities: |  |
Proceeds from the exercise of stock options |  | 215
Net cash provided by financing activities |  | 215
Effect of exchange rate changes on cash | 1 | (331)
Increase (decrease) in cash and cash equivalents | (16) | 831
Cash and cash equivalents, beginning of fiscal year | 18,925 | 11,934
Cash and cash equivalents, end of fiscal period | 18,909 | 12,765
SUPPLEMENTAL CASH FLOW INFORMATION: |  |
Cash paid for interest | 23 | 57
Cash paid for income taxes | 2,074 | 533
Inventory transferred to rental equipment | $ 6,126 | $ 1,781

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