Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash	$ 3,372	$ 7,567
Restricted cash	1,775
Accounts receivable, net	3,304	2,587
Insurance receivable		95
Inventories, net	3,500	2,403
Income taxes receivable		407
Prepaid expenses and other current assets	646	897
Total current assets	12,597	13,956
Property, plant and equipment, net	478	433
Right-of-use assets	2,283	1,504
Notes receivable	5,671	5,350
Other assets	22	44
Total assets	21,051	21,287
Current liabilities
Accounts payable and accrued liabilities	4,673	4,027
Deferred revenue	2,263	714
Current maturities of long-term debt		780
Income taxes payable		17
Total current liabilities	6,936	5,538
Long-term debt		633
Other long-term liabilities	1,943	1,257
Total liabilities	8,879	7,428
Stockholders’ equity
Preferred stock, $0.001 par value, 5,000,000 shares authorized; none issued
Common stock, $0.001 par value, 30,000,000 shares authorized; 8,726,045 shares issued and outstanding on September 30, 2021 and December 31, 2020	9	9
Additional paid-in capital	23,063	23,981
Accumulated other comprehensive income	14	14
Accumulated deficit	(10,914)	(10,145)
Total stockholders’ equity	12,172	13,859
Total liabilities and stockholders’ equity	$ 21,051	$ 21,287

Amount of lessee's right to use underlying asset under leases.

No definition available.

Name:	ppsi_RightOfUseAsset
Namespace Prefix:	ppsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.