Stock-Based Compensation and Similar Arrangements - Narrative (Details) - USD ($)			3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 11, 2020	Jun. 08, 2020	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)			500,109			500,109
Weighted-average exercise price (in usd per share)			$ 64.73			$ 64.73
Stock equivalent units outstanding (in shares)			3,862			3,862
Stock option equivalent units outstanding (in shares)			200,000			200,000
Temporary equity, shares outstanding (in shares)			798,788			798,788		798,788
Temporary equity, par (in usd per share)			$ 0.001			$ 0.001		$ 0.001
Accounting Standards Update [Extensible List]								us-gaap:AccountingStandardsUpdate201711Member
Retained earnings			$ (185,917,000)			$ (185,917,000)		$ (183,733,000)
Cumulative Effect, Period of Adoption, Adjustment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retained earnings								48,951,000
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Temporary equity, shares outstanding (in shares)		369,120,000	54,882			54,882
Temporary equity, par (in usd per share)		$ 0.001
Cash paid, per share (in usd per share)		209.88
Cash payment for shares (in usd per share)		$ 8.82
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion to common stock (in shares)	925,567	2.5075				5,666,000
Convertible shares (in shares)						137,617
Management Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fixed payment					$ 12,000,000			2,720,000
Deferred compensation liability			$ 1,595,000			$ 1,595,000		1,108,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of unvested RSAs outstanding (in shares)			57,122			57,122
Weighted-average grant date fair value (in usd per share)			$ 62.66			$ 62.66
Stock Equivalent Unit Awards and Stock Option Equivalent Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of unvested RSAs outstanding (in shares)			44,412			44,412
Weighted-average grant date fair value (in usd per share)			$ 62.24			$ 62.24
Stock Equivalent Unit Awards and Stock Option Equivalent Units | Accrued Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Liability for unexercised cash settled share-based payment awards			$ 7,127,000			$ 7,127,000		$ 3,282,000
Stock Equivalent Unit Awards and Stock Option Equivalent Units | General and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense (benefit)			$ 4,560,000	$ 1,762,000		$ 3,997,000	$ 573,000