| **Accrued Liabilities and Deferred Credits - Additional Information (Details) $ in Thousands**                                    |         | 3 Months Ended | 9 Months Ended | 12 Months Ended |         |          |
|-----------------------------------------------------------------------------------------------------------------------------------|---------|----------------|----------------|-----------------|---------|----------|
||
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |    |           |           |            |    |     |
| Deferred revenue                                                                                                                  |    | $ 15,484       | $ 15,484       |            |    | $ 15,309 |
| Accruals for fees and expenses for the SEC investigation                                                                          |    | 5,781          | 5,781          |            |    | 0        |
| Liability For Potential Settlement Of Ongoing SEC Investigation                                                                   |    | 3,500          | 3,500          |            | $ 3,500 |     |
| Legal Fees                                                                                                                        |    | 500            | 4,400          |            |    |     |
| Accrued Professional Fees                                                                                                         |    | 2,300          | 2,300          |            |    |     |
| Subsequent Event                                                                                                                  |    |           |           |            |    |     |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |    |           |           |            |    |     |
| Litigation Settlement, Amount                                                                                                     | $ 2,750 |           |           |            |    |     |
| Florida Department of Transportation                                                                                              |    |           |           |            |    |     |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |    |           |           |            |    |     |
| Deferred revenue                                                                                                                  |    | $ 12,500       | $ 12,500       |            |    | $ 12,500 |
| Acres of land sold | a                                                                                                            |    |           |           | 3,900           |    |     |

| X                                                                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                                                 |
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| - Definition
Number Of Acres Sold
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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| - Definition
The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.
+ References
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| X                                                                                                                                                                                                                                                                                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of judgment or settlement awarded to (against) the entity in respect of litigation.
+ References
No definition available.
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