Nature of Business, Liquidity, Basis of Presentation and Summary of Significant Accounting Policies - Liquidity (Additional Information) (Details) - USD ($)		1 Months Ended
	May 01, 2020	Jul. 31, 2018	Apr. 01, 2020	Mar. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Jan. 18, 2018	Jul. 01, 2017	Sep. 30, 2016	Sep. 10, 2016
Subsidiary, Sale of Stock [Line Items]
Current portion of debt				$ 26,226,000	$ 337,583,000
Repayments of principal in next twelve months					353,500,000
IPO
Subsidiary, Sale of Stock [Line Items]
Shares sold in offering (in shares)		20,700,000
Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Subsidiary, Sale of Stock [Line Items]
Current portion of debt					$ 273,410,000
Debt face amount										$ 260,000,000
Interest rate percentage					6.00%
Convertible stock price (in dollars per share)						$ 11.25
Convertible promissory notes | Convertible Promissory Notes Interest Rate 5% Due December 2020, Recourse
Subsidiary, Sale of Stock [Line Items]
Current portion of debt					$ 36,482,000
Interest rate percentage					5.00%		5.00%
Convertible promissory notes | 10% convertible promissory Constellation notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Current portion of debt				$ 0
Interest rate percentage				10.00%
Convertible promissory notes | 10% convertible promissory notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Current portion of debt				$ 0
Debt face amount				$ 290,000,000
Interest rate percentage				10.00%
Convertible stock price (in dollars per share)				$ 8.00
Senior secured notes | Senior Notes Due 2027
Subsidiary, Sale of Stock [Line Items]
Debt face amount				$ 70,000,000
Interest rate percentage				10.25%
Convertible debt | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Subsidiary, Sale of Stock [Line Items]
Debt face amount				$ 289,300,000
Convertible debt | Additional Convertible Notes
Subsidiary, Sale of Stock [Line Items]
Debt face amount				30,000,000
Convertible debt | 10% convertible promissory Constellation notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Debt face amount				36,900,000
Convertible debt | 10% convertible promissory notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Debt face amount				319,300,000
Subsequent Event | Senior secured notes | Senior Notes Due 2027
Subsidiary, Sale of Stock [Line Items]
Debt face amount	$ 70,000,000
Interest rate percentage	10.25%
Subsequent Event | Convertible debt | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Subsidiary, Sale of Stock [Line Items]
Repayments of convertible debt	$ 70,000,000
Subsequent Event | Convertible debt | 10% convertible promissory notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Periodic payment	70,000,000
Repayments of convertible debt	$ 70,000,000
Affiliated entity
Subsidiary, Sale of Stock [Line Items]
Current portion of debt				$ 2,439,000	$ 24,683,000
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Subsidiary, Sale of Stock [Line Items]
Current portion of debt					$ 20,801,000
Interest rate percentage								6.00%	5.00%
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes Interest Rate 5% Due December 2020, Recourse
Subsidiary, Sale of Stock [Line Items]
Convertible stock price (in dollars per share)				$ 38.64
Affiliated entity | Convertible promissory notes | 10% convertible promissory Constellation notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Convertible stock price (in dollars per share)			$ 8.00
Affiliated entity | Convertible promissory notes | 10% convertible promissory notes due December 2021
Subsidiary, Sale of Stock [Line Items]
Current portion of debt				$ 0
Interest rate percentage				10.00%