Note 9 - Leases (Details Textual)
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12 Months Ended |
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Mar. 26, 2021
USD ($)
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Dec. 12, 2012
USD ($)
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Dec. 31, 2022
USD ($)
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Dec. 31, 2021
USD ($)
ft²
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Dec. 31, 2020
USD ($)
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Apr. 30, 2021
USD ($)
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Apr. 21, 2021 |
| Gain (Loss) on Termination of Lease |
$ 500,000
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$ 522,000
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$ (0)
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| Operating Lease, Right-of-Use Asset |
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$ 4,302,000
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$ 3,150,000
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[1] |
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| Lessee, Operating Lease, Renewal Term (Year) |
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2 years
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| Lessee, Operating Lease, Notice Period (Year) |
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18 years
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| Lessee, Operating Lease, Annual Overhead Fee Payments |
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$ 200,000
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| Catalent Pharma Solutions [Member] |
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| Lessee, Operating Lease, Term of Contract (Year) |
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5 years
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| Lessee, Operating Lease, Renewal Term (Year) |
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2 years
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| Catalent Pharma Solutions [Member] | Forecast [Member] |
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| Operating Lease, Expense |
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$ 1,000,000.0
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| Prepaid Expenses and Other Current Assets [Member] |
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| Lessee, Operating Sublease, Deferred Costs |
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$ 300,000
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| Lease for Corporate Headquarters in Hayward, California [Member] |
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| Area of Real Estate Property (Square Foot) | ft² |
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12,106
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| Lessee, Operating Lease, Term of Contract (Year) |
2 years 3 months
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| Lessee, Operating Lease, Monthly Rent |
$ 17,000
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| Lessee, Operating Lease, Abated Rent Period (Month) |
1 month
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| Operating Lease, Right-of-Use Asset |
$ 400,000
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