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Note 16 - Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023
Balance | $ 40,553 | $ 33,812 | $ 47,604 | $ 50,393 | $ 33,812 | $ 50,393 | $ 50,393
Share-based compensation expense | 524 | 446 | 513 | 420 |  |  |
Issuance of common stock upon exercise of stock options, net (in shares) |  |  |  |  | 0 | 69,679 |
Issuance of common stock upon offering, net of issuance costs |  | 10,449 |  |  |  |  |
Issuance of common stock upon exercise of stock options, net |  |  | 54 | 32 |  |  |
Issuance of common stock upon vesting of restricted stock units (in shares) |  |  |  |  | 232,387 | 233,812 |
Issuance of common stock upon vesting of restricted stock units | 0 | 0 | (2) | 0 |  |  |
Stock Issued During Period, Value, Acquisitions |  | 1,924 |  |  |  |  |
Release of obligation to issue common stock |  | 0 |  | 0 |  |  |
Accumulated other comprehensive loss | (59) | 119 | 81 | 266 |  |  |
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock | 158 | 527 |  |  |  |  |
Net loss | (6,938) | (6,724) | (3,403) | (3,507) | $ (13,662) | $ (6,910) |
Issuance of common stock upon cashless exercise of stock options, net |  |  | 0 |  |  |  |
Shares retained for payment of taxes in connection with settlement of restricted stock units | (12) |  | (45) |  |  |  |
Balance | 34,882 | $ 40,553 | $ 44,802 | $ 47,604 | $ 34,882 | $ 44,802 | $ 33,812
Contingent Consideration Liability [Member] |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | $ 656 |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |
Balance (in shares) | 44,027,121 | 37,211,071 | 36,713,471 | 36,611,240 | 37,211,071 | 36,611,240 | 36,611,240
Balance | $ 440 | $ 372 | $ 367 | $ 366 | $ 372 | $ 366 | $ 366
Share-based compensation expense | $ 0 | $ 0 | $ 0 |  |  |  |
Issuance of common stock upon offering, net of issuance costs (in shares) |  | 5,750,000 |  |  |  |  |
Issuance of common stock upon exercise of stock options, net (in shares) |  |  | 33,765 | 20,000 |  |  |
Issuance of common stock upon offering, net of issuance costs |  | $ 57 |  |  |  |  |
Issuance of common stock upon exercise of stock options, net |  |  | $ 1 | $ 0 |  |  |
Issuance of common stock upon vesting of restricted stock units (in shares) | 229,233 | 10,000 | 232,761 | 12,667 |  |  |
Issuance of common stock upon vesting of restricted stock units | $ 2 | $ 0 | $ 2 | $ 0 |  |  |
Stock Issued During Period, Shares, Acquisitions |  | 986,486 |  |  |  |  |
Release of obligation to issue common stock (in shares) |  | 69,564 |  | 69,564 |  |  |
Stock Issued During Period, Value, Acquisitions |  | $ 10 |  |  |  |  |
Release of obligation to issue common stock |  | 1 |  | $ 1 |  |  |
Accumulated other comprehensive loss | 0 | 0 | 0 | 0 |  |  |
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock | 0 | 0 |  |  |  |  |
Net loss | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Issuance of common stock upon cashless exercise of stock options, net (in shares) |  |  | 15,914 |  |  |  |
Issuance of common stock upon cashless exercise of stock options, net |  |  | $ 0 |  |  |  |
Shares retained for payment of taxes in connection with settlement of restricted stock units (in shares) | (6,846) |  | (11,616) |  |  |  |
Shares retained for payment of taxes in connection with settlement of restricted stock units | $ 0 |  | $ 0 |  |  |  |
Balance (in shares) | 44,485,851 | 44,027,121 | 36,984,295 | 36,713,471 | 44,485,851 | 36,984,295 | 37,211,071
Balance | $ 445 | $ 440 | $ 370 | $ 367 | $ 445 | $ 370 | $ 372
Common Stock [Member] | Contingent Consideration Liability [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions | 236,343 |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | $ 3 |  |  |  |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |
Balance | 123,725 | 110,379 | 109,003 | 108,551 | 110,379 | 108,551 | 108,551
Share-based compensation expense | 524 | 446 | 513 | 420 |  |  |
Issuance of common stock upon offering, net of issuance costs |  | 10,449 |  |  |  |  |
Issuance of common stock upon exercise of stock options, net |  |  | 54 | 32 |  |  |
Issuance of common stock upon vesting of restricted stock units | 0 | 0 | (2) | 0 |  |  |
Stock Issued During Period, Value, Acquisitions |  | 1,924 |  |  |  |  |
Release of obligation to issue common stock |  | 0 |  | 0 |  |  |
Accumulated other comprehensive loss | 0 | 0 | 0 | 0 |  |  |
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock | 158 | 527 |  |  |  |  |
Net loss | 0 | 0 | 0 | 0 |  |  |
Issuance of common stock upon cashless exercise of stock options, net |  |  | 0 |  |  |  |
Shares retained for payment of taxes in connection with settlement of restricted stock units | (12) |  | (45) |  |  |  |
Balance | 125,051 | 123,725 | 109,523 | 109,003 | 125,051 | 109,523 | 110,379
Additional Paid-in Capital [Member] | Contingent Consideration Liability [Member] |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | 656 |  |  |  |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |
Balance | (82,786) | (76,062) | (60,873) | (57,366) | (76,062) | (57,366) | (57,366)
Share-based compensation expense | 0 | 0 | 0 | 0 |  |  |
Issuance of common stock upon offering, net of issuance costs |  | 0 |  |  |  |  |
Issuance of common stock upon exercise of stock options, net |  |  | 0 | 0 |  |  |
Issuance of common stock upon vesting of restricted stock units | 0 | 0 | 0 | 0 |  |  |
Stock Issued During Period, Value, Acquisitions |  | 0 |  |  |  |  |
Release of obligation to issue common stock |  | 0 |  | 0 |  |  |
Accumulated other comprehensive loss | 0 | 0 | 0 | 0 |  |  |
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock | 0 | 0 |  |  |  |  |
Net loss | (6,938) | (6,724) | (3,403) | (3,507) |  |  |
Issuance of common stock upon cashless exercise of stock options, net |  |  | 0 |  |  |  |
Shares retained for payment of taxes in connection with settlement of restricted stock units | 0 |  | 0 |  |  |  |
Balance | (89,724) | (82,786) | (64,276) | (60,873) | (89,724) | (64,276) | (76,062)
Retained Earnings [Member] | Contingent Consideration Liability [Member] |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | 0 |  |  |  |  |  |
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |
Balance | (386) | (505) | (526) | (792) | (505) | (792) | (792)
Share-based compensation expense | 0 | 0 | 0 | 0 |  |  |
Issuance of common stock upon offering, net of issuance costs |  | 0 |  |  |  |  |
Issuance of common stock upon exercise of stock options, net |  |  | 0 | 0 |  |  |
Issuance of common stock upon vesting of restricted stock units | 0 | 0 | 0 | 0 |  |  |
Stock Issued During Period, Value, Acquisitions |  | 0 |  |  |  |  |
Release of obligation to issue common stock |  | 0 |  |  |  |  |
Accumulated other comprehensive loss | (59) | 119 | 81 | 266 |  |  |
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock | 0 | 0 |  |  |  |  |
Net loss | 0 | 0 | 0 |  |  |  |
Issuance of common stock upon cashless exercise of stock options, net |  |  | 0 |  |  |  |
Shares retained for payment of taxes in connection with settlement of restricted stock units | 0 |  | 0 |  |  |  |
Balance | (445) | $ (386) | $ (445) | $ (526) | $ (445) | $ (445) | $ (505)
AOCI Attributable to Parent [Member] | Contingent Consideration Liability [Member] |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | $ 0 |  |  |  |  |  |

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