XML 39 R29.htm IDEA: XBRL DOCUMENT v3.22.0.1

Account Receivable and Contract Assets (Tables)

9 Months Ended

Jan. 31, 2022

Account Receivable And Contract Assets

Schedule of Accounts Receivable, Contract Assets and Contract Liabilities

The following provides further details on the balance sheet accounts of accounts receivable and contract assets from contracts with customers:

 Schedule of Accounts Receivable, Contract Assets and Contract Liabilities

		January 31, 2022				April 30, 2021
		(in thousands)
Accounts receivable		$	113			$	350
Contract assets			407				190
Contract liabilities			15				—

Schedule of Significant Changes in Contract Assets and Contract Liabilities

 Schedule of Significant Changes in Contract Assets and Contract Liabilities

		Nine months ended January 31, 2022
		(in thousands)
Transferred to receivables from contract assets recognized at the beginning of the period		$	(190	)
Revenue recognized and not billed as of the end of the period			407
Net change in contract assets		$	217

X

- References

No definition available.

+ Details

Name:	OPTT_DisclosureAccountReceivableAndContractAssetsAbstract
Namespace Prefix:	OPTT_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule Of Accounts Receivable Contract Assets And Contract Liabilities [Table Text Block]

+ References

No definition available.

+ Details

Name:	OPTT_ScheduleOfAccountsReceivableContractAssetsAndContractLiabilitiesTableTextBlock
Namespace Prefix:	OPTT_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

+ Details

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