XML 64 R13.htm IDEA: XBRL DOCUMENT
v3.20.1

Composition of Certain Financial Statement Captions | 12 Months Ended
--- | ---
Dec. 31, 2019
Composition Of Certain Financial Statement Captions [Abstract] |
Composition of Certain Financial Statement Captions |
6. | Composition of Certain Financial Statement Captions
Other Current Assets As of December 31, 2019 and 2018, other current assets were comprised of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Prepaid services |  | $ | 277 |  |  | $ | 166 |
Prepaid insurance |  |  | 536 |  |  |  | 564 |
Other receivables |  |  | 144 |  |  |  | 55 |
|  | $ | 957 |  |  | $ | 785 |
Property and Equipment, net As of December 31, 2019 and 2018, property and equipment, net, were comprised of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Office and computer equipment |  | $ | 1,518 |  |  | $ | 1,279 |
Leasehold improvements |  |  | 1,682 |  |  |  | 1,682 |
|  |  | 3,200 |  |  |  | 2,961 |
Less accumulated depreciation |  |  | (1,021 | ) |  |  | (662 | )
|  | $ | 2,179 |  |  | $ | 2,299 |
Depreciation expense totaled $0.4 million and $0.3 million for the years ended December 31, 2019 and 2018, respectively. Accounts Payable and Accrued Expenses As of December 31, 2019 and 2018, accounts payable and accrued expenses were comprised of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Accrued expenses |  | $ | 791 |  |  | $ | 824 |
Accounts payable |  |  | 327 |  |  |  | 721 |
Accrued payroll and bonus |  |  | 679 |  |  |  | 423 |
Accrued professional fees |  |  | 332 |  |  |  | 186 |
Accrued vacation and compensation |  |  | 166 |  |  |  | 192 |
Accrued R&D studies |  |  | 858 |  |  |  | 230 |
Finance lease obligation - current |  |  | 120 |  |  |  | — |
Other current liabilities |  |  | 6 |  |  |  | 201 |
|  | $ | 3,279 |  |  | $ | 2,777 |

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 The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
Name: | us-gaap_SupplementalBalanceSheetDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration