XML 44 R32.htm IDEA: XBRL DOCUMENT
v3.24.1

Stockholders’ Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Equity [Abstract] |
Schedule of Liability-Classified Warrants Outstanding | As of December 31, 2023, the Company had the following liability-classified warrants outstanding (amounts in thousands):
|  | Number of warrants |  |  |  |
|  | on common shares |  |  | Amount |
Balance as of December 31, 2021 |  |  | — |  |  | $ | — |
Recognition of warrant liabilities |  |  | 92 |  |  |  | 3,674 |
Change in fair value of warrants |  |  | — |  |  |  | (1,595 | )
Balance as of December 31, 2022 |  |  | 92 |  |  |  | 2,079 |
Recognition of warrant liabilities |  |  | 143 |  |  |  | 3,162 |
Change in fair value of warrants |  |  | — |  |  |  | (3,493 | )
Balance as of December 31, 2023 |  |  | 235 |  |  | $ | 1,748 |
Schedule of Initial Fair Value of Purchase Warrants | As of December 31, 2023, the Company had the following equity-classified warrants outstanding (share amounts in thousands):
|  | 2022 Purchase Warrant |  |  | 2023 Purchase Warrant |
Expected term based on contractual term |  |  | 5.5 years |  |  |  | 5.0 years |
Interest rate (risk-free rate): |  |  | 3.75 | % |  |  | 4.16 | %
Expected volatility |  |  | 123 | % |  |  | 118 | %
Expected dividend |  |  | — |  |  |  | — |
Fair value of warrants (in thousands) |  | $ | 3,674 |  |  | $ | 3,162 |
The table also includes the total fair value determined at valuation date based on these assumptions.
|  | 2022 Purchase Warrant |  |  | 2023 Purchase Warrant |
Expected term based on contractual term |  |  | 4.4 years |  |  |  | 4.2 years |
Interest rate (risk-free rate): |  |  | 3.84 | % |  |  | 3.84 | %
Expected volatility |  |  | 116 | % |  |  | 116 | %
Expected dividend |  |  | — |  |  |  | — |
Fair value of warrants (in thousands) |  | $ | 653 |  |  | $ | 1,095 |
Schedule of Initial Fair Value of Purchase Warrants | As of December 31, 2023, the Company had the following equity-classified warrants outstanding (share amounts in thousands):
Warrant Type |  | Number of Shares |  |  | Exercise Price |  |  | Expiration |
Balance as of December 31, 2022 |  |  | 33 |  |  |  |  |  |  |  |  |
Warrants expired |  |  | (1 | ) |  | $ | 47.00 |  |  |  | January 2023 |
Warrants expired |  |  | (3 | ) |  | $ | 96.00 |  |  |  | October 2023 |
Pre-funded warrants issued |  |  | 86 |  |  | $ | 0.40 |  |  |  | — |
Pre-funded warrants exercised |  |  | (115 | ) |  | $ | 0.40 |  |  |  | — |
Balance as of December 31, 2023 |  |  | - |  |  |  |  |  |  |  |  |
As of December 31, 2022, the Company had the following equity-classified warrants outstanding (share amounts in thousands):
Warrant Type |  | Number of Shares |  |  | Exercise Price |  |  | Expiration |
Common stock |  |  | 1 |  |  | $ | 1,880.00 |  |  |  | January 2023 |
Common stock |  |  | 3 |  |  | $ | 96.00 |  |  |  | October 2023 |
Common stock |  |  | 29 |  |  | $ | 0.40 |  |  |  | — |
|  |  | 33 |  |  |  |  |  |  |  |  |

X
- References No definition available. + Details
Name: | prso_StockholdersEquityTablesLineItems
Namespace Prefix: | prso_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-1 + Details
Name: | us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 + Details
Name: | us-gaap_ScheduleOfStockholdersEquityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration