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Subsequent Events - Narrative (Details) - USD ($) | 1 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 31, 2018 | Jun. 30, 2018 | Aug. 09, 2018 | Jul. 21, 2018 | Dec. 31, 2017
Common Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock conversion (in shares) |  | 1,851,000 |  |  |
Series C Preferred Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock, shares issued (in shares) |  | 1,275 |  |  | 0
Series C Preferred Stock | Preferred Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock conversion (in shares) |  | (475) |  |  |
Series C Preferred Stock | Common Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock conversion (in shares) |  | 1,583,000 |  |  |
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount (up to) |  |  |  | $ 750,000 |
Subsequent Event | Series C Preferred Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 775 |  |
Subsequent Event | Series C Preferred Stock | Preferred Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock conversion (in shares) | 500 |  |  |  |
Subsequent Event | Series C Preferred Stock | Common Stock |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock conversion (in shares) | 1,666,666 |  |  |  |

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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Number of shares issued during the period as a result of the conversion of convertible securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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