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Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2024 | Oct. 31, 2023 | Sep. 30, 2022 | Nov. 30, 2021 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss |  |  |  |  | $ 185 |  | $ 185 |  | $ 129
Inventory Valuation Reserves |  |  |  |  | 72 |  | 72 |  | 76
Payments to Acquire Intangible Assets |  |  |  |  |  |  | 1,868 | $ (0) |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  | 1,772 |  | 1,772 |  |
Amortization of Intangible Assets |  |  |  |  | 267 |  | 487 |  |
Impairment, Long-Lived Asset, Held-for-Use |  |  |  |  |  |  | 0 | 0 |
Finance Lease, Liability |  |  |  |  | 0 |  | 0 |  | 0
Medicaid Liability |  |  |  |  | 7,142 |  | $ 7,142 |  | $ 3,627
Percentage for Valuation Reserve Against Deferred Tax Assets |  |  |  |  |  |  | 100.00% |  | 100.00%
Income Tax Expense (Benefit) |  |  |  |  | 54 | $ 0 | $ 54 | $ 0 |
Effective Income Tax Rate Reconciliation, Percent |  |  |  |  |  |  | 1.80% | 0.00% |
Unrecognized Tax Benefits |  |  |  |  | 0 |  | $ 0 |  | $ 0
Income Tax Examination, Penalties and Interest Accrued |  |  |  |  | $ 0 |  | 0 |  |
Income Tax Examination, Penalties and Interest Expense |  |  |  |  |  |  | $ 0 |  | $ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |  |  |  |  | 6,636,723 | 4,887,018 | 6,284,721 | 4,887,018 |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | AnovoRx [Member] |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 95.90% | 63.50% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | AnovoRx [Member] |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 96.20% |  | 97.40%
Carglumic Acid Product Rights [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Intangible Assets |  |  |  | $ 3,250 |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  | 10 years |  |  |  |  |
Betaine Anhydrous Product Rights [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Intangible Assets |  |  | $ 2,125 |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  | 5 years |  |  |  |  |  |
Nitisinone Product Rights [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Intangible Assets |  | $ 650 |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 5 years |  |  |  |  |  |  |
PKU GoLike [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Intangible Assets | $ 1,868 |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |  |  |  |  |  |  |  |
Computer Equipment [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  | 3 years |  | 3 years |  |
Furniture and Fixtures [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  | 5 years |  | 5 years |  |

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