XML 48 R35.htm IDEA: XBRL DOCUMENT v3.25.1

Stockholders’ Equity (Tables)

12 Months Ended

Dec. 31, 2024

Equity [Abstract]

Schedule of Stock Options Activity

The following table summarizes stock options activity during Fiscal 2024 and 2023 (in thousands, except per share data).

			Number of Shares						Weighted Average Exercise Price						Weighted Average Remaining Contractual Life (in years)						Total Intrinsic Value
Outstanding as of January 1, 2023			3,952						$	5.35					3.8						$	20,379
Granted			1,135						8.65						5.0						—
Exercised			(1,348)						0.98						—						—
Forfeited			(788)						8.64						—						—
Outstanding as of December 31, 2023			2,951						7.30						4.8						693
Granted			1,840						6.01						7.0						—
Forfeited			(910)						7.48						—						—
Outstanding as of December 31, 2024			3,881						$	6.64					4.9						$	—
Options vested and exercisable			2,108						$	6.55					4.1						$	—

Summary of Weighted Average Assumptions Used in Determining Fair Value of Options

The following table summarizes weighted average assumptions used in determining the fair value of the stock options at the date of grant during Fiscal 2024 and 2023:

			For the years ended December 31,
			2024						2023
Exercise price			$	6.01					$	8.65
Expected term (years)			4.5						4.7
Expected stock price volatility			80		%				80		%
Risk-free rate of interest			4.2		%				3.7		%
Expected dividend yield (per share)			0		%				0		%

Schedule of Warrant Activity

The following table summarizes warrant activities during Fiscal 2024 and 2023 (in thousands, except per share data):

			Number of Shares						Weighted Average Exercise Price						Weighted Average Remaining Contractual Life (in years)
Outstanding as of January 1, 2023			855						$	8.23					0.9
Warrants granted			376						9.13						4.2
Warrants exercised			(400)						3.00
Outstanding as of December 31, 2023			831						11.16						1.9
Warrants granted			240						0.90						5.0
Warrants expired			(455)						12.83
Outstanding as of December 31, 2024			616						$	5.93					3.8
Warrants vested and exercisable			376						$	5.93					3.8

X

- Definition

Schedule of Warrant Activity

+ References

No definition available.

+ Details

Name:	prph_ScheduleOfWarrantActivityTableTextBlock
Namespace Prefix:	prph_
Data Type:	dtr-types1:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration