XML 32 R20.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Shares Issued through Equity Offering Program | 9 Months Ended
--- | ---
Sep. 30, 2017
Shares Issued through Equity Offering Program |
Shares Issued through Equity Offering Program | Note 12 — Shares Issued through Equity Offering Program During the three months ended September 30, 2017, the Company sold 103,196 shares for proceeds of $2,461,000, net of commissions of $25,000, and incurred offering costs of $43,000 for professional fees. During the nine months ended September 30, 2017, the Company sold 135,196 shares for proceeds of $3,252,000, net of commissions of $33,000, and incurred offering costs of $185,000 for professional fees. Subsequent to September 30, 2017, the Company sold 4,197 shares for proceeds of $102,000, net of commissions of $1,000.

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

X
- Definition The entire disclosure of public offering of the common stock issued by the entity, which includes the number of shares issued and their amount of proceeds. + References No definition available. + Details
Name: | olp_PublicOfferingDisclosureTextBlock
Namespace Prefix: | olp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration