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Equity Transactions - Vesting (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) item | Jun. 30, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2017 USD ($)
Employee and Non Employees Stock Option |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Intrinsic value of options exercised |  |  |  |  | $ 0.1 |
Unrecognized compensation | $ 1.2 |  |  | $ 1.2 |  |
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted |  |  |  | 1 year 3 months 18 days |  |
Stock based compensation expense | 0.4 |  | $ 0.5 | $ 0.8 | 1.1 |
Restricted Stock |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Unrecognized compensation | 22.0 |  |  | $ 22.0 |  |
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted |  |  |  | 1 year 7 months 6 days |  |
Stock based compensation expense | 3.9 |  | 4.2 | $ 7.8 | 8.2 |
Performance Share Units |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Unrecognized compensation | 1.4 |  |  | 1.4 |  |
Stock based compensation expense | 3.0 | $ 3.8 | $ 0.0 | 3.5 | $ 0.0 |
Performance Shares Tranche #2 |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Unrecognized compensation |  |  |  |  |  | $ 3.5
Stock based compensation expense | $ 2.5 |  |  | $ 0.0 |  |
Number of performance measures | item | 2 |  |  |  |  |
Quarterly Period Beginning November 15, 2017 | Performance Share Units |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Earned award vesting percentage |  |  |  | 30.00% |  |
Period After August 15, 2018 | Performance Share Units |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Earned award vesting percentage |  |  |  | 70.00% |  |
Maximum |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Vesting period. |  |  |  | 3 years |  |
Minimum |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |
Vesting period. |  |  |  | 2 years |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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