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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating Activities:    
Net loss $ (6,724) $ (3,507)
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization 729 643
Amortization of debt issuance costs 0 5
Warranty provision (22) 24
Inventory obsolescence 39 46
Loss on disposition of fixed assets 2 0
Stock-based compensation 446 420
Partial release of valuation allowance (517) 0
Amortization of operating lease right of use asset 192 199
Accretion of acquisition holdback liability 5 12
Accretion of acquisition contingent consideration 46 0
Depreciation and amortization 729 643
Increase (Decrease) in Operating Capital [Abstract]    
Accounts receivable, net 1,666 3,482
Inventories, net (429) (2,041)
Prepaid expenses and other (249) 624
Accounts payable (902) 249
Accrued and other liabilities (11) (5,006)
Net cash used in operating activities (5,729) (4,850)
Investing Activities:    
Purchases of marketable securities (7,532) (1,994)
Proceeds from maturities of marketable securities 247 1,609
Cash paid for acquisitions (923) 0
Cash paid for asset purchase holdback liability (764) 0
Capital expenditures (142) (98)
Net cash used in investing activities (9,114) (483)
Financing Activities:    
Proceeds from exercise of stock options 0 32
Proceeds from offering of common stock, net of issuance costs 10,449 0
Net cash provided by financing activities 10,449 32
Effect of foreign exchange rate on cash 1 39
Net decrease in cash, cash equivalents, and restricted cash (4,393) (5,262)
Cash, cash equivalents and restricted cash, beginning of period 9,519 13,659
Cash, cash equivalents and restricted cash, end of period 5,126 8,397
Cash and cash equivalents 4,780 7,563
Restricted cash, current portion 0 738
Long-term restricted cash 346 96
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows 5,126 8,397
Noncash investing and financing activities:    
Change in unrealized loss on marketable securities 10 21
Amika Mobile [Member]    
Noncash investing and financing activities:    
Obligation to issue common stock in connection with purchase 0 (416)
Evertel Technologies, LLC [Member]    
Noncash investing and financing activities:    
Obligation to issue common stock in connection with purchase (527) 0
Shares issued in connection with the Evertel acquisition (1,924) 0
Contingent consideration payable in connection with the Evertel acquisition (890) 0
Holdback liability payable in connection with the Evertel acquisition $ (230) $ 0