XML 38 R26.htm IDEA: XBRL DOCUMENT v3.22.0.1

Composition of Certain Financial Statement Captions (Tables)

12 Months Ended

Dec. 31, 2021

Composition Of Certain Financial Statement Captions [Abstract]

Other Current Assets

Other Current Assets

As of December 31, 2021 and 2020, other current assets were comprised of the following (in thousands):

		December 31,
		2021				2020
Prepaid services		$	622			$	131
Prepaid insurance			695				639
Other			7				59
		$	1,324			$	829

Property and Equipment, net

Property and Equipment, net

As of December 31, 2021 and 2020, property and equipment, net, were comprised of the following (in thousands):

		December 31,
		2021				2020
Office and computer equipment		$	1,231			$	1,525
Leasehold improvements			1,661				1,682
			2,892				3,207
Less accumulated depreciation			(1,415	)			(1,387	)
		$	1,477			$	1,820

Accounts Payable and Accrued Expenses

Accounts Payable and Accrued Expenses

As of December 31, 2021 and 2020, accounts payable and accrued expenses were comprised of the following (in thousands):

		December 31,
		2021				2020
Accounts payable		$	2,611			$	789
Accrued payroll and bonus			781				738
Accrued professional fees			189				276
Accrued vacation and compensation			252				245
Finance lease obligation -- current			—				10
Other current liabilities			122				23
Accrued R&D studies			196				—
		$	4,151			$	2,081

X

- Definition

Composition of Certain Financial Statement Captions [Abstract]

+ References

No definition available.

+ Details

Name:	pstv_CompositionOfCertainFinancialStatementCaptionsAbstract
Namespace Prefix:	pstv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

+ Details

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

X

- Definition

Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses.

+ References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of the carrying amounts of other current assets.

+ References

No definition available.

+ Details

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