XML 56 R45.htm IDEA: XBRL DOCUMENT v3.7.0.1

Shares Issued through Equity Offering Program (Details) - USD ($)		3 Months Ended
	Mar. 20, 2014	Mar. 31, 2017
Shares Issued through Equity Offering Program
Maximum aggregate sales price of shares to be sold under an Equity Offering Sales Agreement	$ 38,360,000
Number of shares sold (in shares)		27,800
Proceeds from sale of shares, net of commission and before offering costs		$ 692,000
Payment of commissions on sale of shares		7,000
Payment of offering costs on sale of shares.		$ 57,000

X

- Definition

Represents the maximum aggregate sales price of shares to be sold under an equity offering program.

+ References

No definition available.

+ Details

Name:	olp_MaximumAggregateSalesPriceOfSharesToBeSoldUnderEquityOfferingProgram
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow for commissions incurred directly with the issuance of an equity security.

+ References

No definition available.

+ Details

Name:	olp_PaymentOfCommissionsOnSaleOfShares
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow for offering costs incurred directly with the issuance of an equity security.

+ References

No definition available.

+ Details

Name:	olp_PaymentOfOfferingCostsOnSaleOfShares
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	olp_PublicOfferingDisclosureAbstract
Namespace Prefix:	olp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the net proceeds after commissions but before offering costs from new stocks issued during the period.

+ References

No definition available.

+ Details

Name:	olp_StockIssuedDuringPeriodValueNewIssuesNetProceedBeforeOfferingCosts
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration