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Debt - Schedule of Debt (With Related Parties) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Oct. 31, 2019	Sep. 16, 2019
Debt Instrument [Line Items]
Less current portion	$ (24,170)		$ (50,252)
Long-term debt, less current portion - related party	11,399		3,379
Senior Promissory Note Issued February One Two Thousand And Seventeen To Former EAF [Member]
Debt Instrument [Line Items]
Less current portion	(3,800)		(3,800)
Promissory Note Issued February One Two Thousand And Seventeen To Former EAF [Member]
Debt Instrument [Line Items]
Less current portion	(4,000)		(4,000)
Promissory Note Stockholder Issued June One Two Thousand And Eighteen [Member]
Debt Instrument [Line Items]
Less current portion			(1,700)
Antara Financing Agreement [Member]
Debt Instrument [Line Items]
Long-term debt, net		$ 16,700
Antara Financing Agreement [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, gross				$ 2,100	$ 22,400
Less current portion	(17,400)		(33,600)
Long Term Debt With Related Parties [Member]
Debt Instrument [Line Items]
Long-term debt, gross	43,090		62,478
Debt issuance costs	(19)		(36)
Debt discount	(7,502)		(8,811)
Long-term debt, net	35,569		53,631
Less current portion	(24,170)		(50,252)
Long-term debt, less current portion - related party	11,399		3,379
Long Term Debt With Related Parties [Member] \| Four Promissory Notes Issued February 1, 2017 to Former EAF [Member]
Debt Instrument [Line Items]
Long-term debt, gross	9,500		9,500
Long Term Debt With Related Parties [Member] \| Senior Promissory Note Issued February One Two Thousand And Seventeen To Former EAF [Member]
Debt Instrument [Line Items]
Long-term debt, gross	3,800		3,800
Long Term Debt With Related Parties [Member] \| Promissory Note Issued February One Two Thousand And Seventeen To Former EAF [Member]
Debt Instrument [Line Items]
Long-term debt, gross	4,000		4,000
Long Term Debt With Related Parties [Member] \| Secured Convertible Promissory Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross			3,280
Long Term Debt With Related Parties [Member] \| Promissory Note Stockholder Issued June One Two Thousand And Eighteen [Member]
Debt Instrument [Line Items]
Long-term debt, gross	1,626		1,732
Long Term Debt With Related Parties [Member] \| Promissory Note Stockholder Issued February Two Two Thousand And Nineteen [Member]
Debt Instrument [Line Items]
Long-term debt, gross	6,374		6,111
Long Term Debt With Related Parties [Member] \| Notes Payable Acquired From Ritter [Member]
Debt Instrument [Line Items]
Long-term debt, gross	421		439
Long Term Debt With Related Parties [Member] \| Antara Financing Agreement [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 17,369		$ 33,616