Debt - Additional Information (Details) - USD ($)
$ in Thousands |
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|
12 Months Ended |
Aug. 18, 2021 |
May 09, 2020 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
| Debt Instrument [Line Items] |
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|
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| Proceeds from convertible debt |
|
|
$ 0
|
$ 3,650
|
$ 5,000
|
| Gain on loan forgiveness |
|
|
(647)
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|
| Interest payable current |
|
|
77
|
3
|
|
| Proceeds from PPP loan |
|
|
0
|
640
|
|
| Debt issuance costs |
|
|
518
|
|
|
| Debt instrument, extended maturity date |
Feb. 01, 2026
|
|
|
|
|
| Long-term debt |
|
|
9,505
|
640
|
|
| Convertible Debt [Member] |
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|
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| Debt Instrument [Line Items] |
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| Debt instrument, interest rate |
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|
|
|
2.13%
|
| PPP Loan [Member] | Celtic Bank Corporation [Member] |
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| Debt Instrument [Line Items] |
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|
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|
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| Long term debt stated interest rate percentage |
|
1.00%
|
|
|
|
| Gain on loan forgiveness |
|
$ 647
|
|
|
|
| Proceeds from notes payable |
|
$ 640
|
|
|
|
| Long term debt moratorium period |
|
10 months
|
|
|
|
| Long term debt term |
|
2 years
|
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| Secured Debt [Member] | Hercules Capital Inc [Member] |
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| Debt Instrument [Line Items] |
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|
|
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| Debt instrument, interest rate |
3.25%
|
|
|
|
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| Interest payable current |
|
|
77
|
|
|
| Debt instrument, frequency of principal and interest payment |
monthly
|
|
|
|
|
| Debt issuance costs |
$ 518
|
|
|
|
|
| Amortization expense |
|
|
$ 23
|
$ 0
|
|
| Debt instrument maturity date |
Aug. 01, 2025
|
|
|
|
|
| Debt instrument interest only payments maturity date |
Mar. 01, 2023
|
|
|
|
|
| Debt instrument interest only payments extended maturity date |
Sep. 01, 2023
|
|
|
|
|
| Debt instruments interest only payments extended maturity date upon the achievement of certain milestone |
Sep. 01, 2024
|
|
|
|
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| Debt instrument, interest rate terms |
|
|
The outstanding principal bears interest at the greater of (a) 8.95% or (b) 8.95% plus the prime rate minus 3.25%.
|
|
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| Repayments of debt |
$ 893
|
|
|
|
|
| Percentage of outstanding principal upon repayment of the loan |
5.95%
|
|
|
|
|
| Proceeds from equity financing |
$ 40,000
|
|
|
|
|
| Debt instrument, face amount |
50,000
|
|
|
|
|
| Long-term debt |
$ 9,505
|
|
|
|
|
| Long term debt variable interest rate percentage |
8.95%
|
|
8.95%
|
|
|
| Long term debt base rate percentage |
8.95%
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|
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|
| Secured Debt [Member] | Hercules Capital Inc [Member] | Tranche One [Member] |
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|
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| Debt Instrument [Line Items] |
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|
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| Debt instrument, face amount |
$ 15,000
|
|
|
|
|
| Secured Debt [Member] | Hercules Capital Inc [Member] | Tranche Two [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
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|
|
|
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| Debt instrument, face amount |
10,000
|
|
|
|
|
| Secured Debt [Member] | Hercules Capital Inc [Member] | Tranche Three [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt instrument, face amount |
10,000
|
|
|
|
|
| Secured Debt [Member] | Hercules Capital Inc [Member] | Tranche Four [Member] |
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|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
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| Debt instrument, face amount |
15,000
|
|
|
|
|
| Secured Debt [Member] | Hercules Capital Inc [Member] | Tranche Five [Member] |
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|
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| Debt Instrument [Line Items] |
|
|
|
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| Debt instrument, face amount |
$ 10,000
|
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|
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