Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options vested.

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Stock Based Compensation - (Details) - $ / shares	1 Months Ended				11 Months Ended	12 Months Ended
Stock Based Compensation - (Details) - $ / shares	Feb. 28, 2017	Jan. 31, 2017	Dec. 31, 2016	May 31, 2016	Dec. 12, 2018	Dec. 31, 2018
2011 Management Equity Incentive Plan
Stock based compensation
Total number of awards available under the plans (in shares)					2,941,746
Number of additional shares available for grant					1,492,167
Stock options
Stock based compensation
Term of awards granted under the plan						10 years
Cancelled (in shares)				1,270,106
Granted (in shares)	80,833	80,833	20,000	1,243,299	76,559
Granted (in dollars per share)	$ 2.25	$ 2.25	$ 2.25	$ 2.25	$ 1.00
Vested (in shares)	3,833	3,833	6,000	1,233,499
Vested or expected to vest at the end of the period (in shares)				9,800	1,409,191
Minimum \| Stock options
Stock based compensation
Vesting period						4 years
Maximum \| Stock options
Stock based compensation
Vesting period						5 years