XML 71 R31.htm IDEA: XBRL DOCUMENT
v3.19.3

Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Future Minimum Annual Rental Commitments Under Leases | At September 30, 2019, the future minimum annual rental commitments and expected receipts under non-cancelable operating leases having terms in excess of one year were as follows (in thousands):
Years Ended September 30, | Operating Leases Payments |  | Operating Sublease Income
2020 | $ | 3,040 |  |  | $ | (877 | )
2021 | 2,859 |  |  | (1,028 | )
2022 | 2,612 |  |  | (1,159 | )
2023 | 1,508 |  |  | (943 | )
2024 | 85 |  |  | — |
Thereafter | — |  |  | — |
Total lease commitments | $ | 10,104 |  |  | $ | (4,007 | )
Schedule of Lease Expense and Sublease Income | Lease expense and sublease income from third parties was as follows (in thousands):
| Year Ended September 30,
| 2019 |  | 2018 |  | 2017
Lease expense | $ | 3,493 |  |  | $ | 3,432 |  |  | $ | 3,734 |
Sublease income from third parties | (1,280 | ) |  | (1,487 | ) |  | (1,389 | )

X
- Definition Schedule of Lease Expense and Sublease Income [Table Text Block] + References No definition available. + Details
Name: | powl_ScheduleofLeaseExpenseandSubleaseIncomeTableTextBlock
Namespace Prefix: | powl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration