Debt - Narrative (Details)											1 Months Ended				3 Months Ended				6 Months Ended	12 Months Ended
	Jan. 27, 2021 USD ($) $ / shares shares	Sep. 22, 2020 USD ($) $ / shares	Jul. 20, 2020 USD ($) loan $ / shares shares	May 28, 2020 USD ($) $ / shares	Apr. 06, 2020 USD ($) $ / shares shares	Oct. 31, 2019 USD ($) $ / shares	Sep. 18, 2019 USD ($)	Dec. 21, 2018 USD ($)	Dec. 13, 2018 USD ($) loan	Apr. 27, 2018 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares	Nov. 30, 2019 USD ($)	Apr. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)	Mar. 31, 2021 USD ($) shares	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) $ / shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Nov. 02, 2020	May 15, 2020
Debt Instrument [Line Items]
Stated interest rate																						1.00%
Aggregate principal amount															$ 108,792,000				$ 108,792,000	$ 181,580,000
Non cash interest expense															3,134,000			$ 1,984,000
Partial extinguishment of equity component															26,877,000
Reverse stock split, conversion ratio				0.10
Derivative liability				$ 6,300,000													$ 5,600,000
Remeasured derivative liability															0				$ 0	7,507,000
Mark-to-market loss recognized																	$ 3,500,000
Gain (loss) on restructuring															$ 22,439,000			0
Pre-reverse stock split shares (in shares) | shares					538,995										538,995				538,995
Exercise price (dollars per share) | $ / shares			$ 0.01		$ 0.01
Estimated fair value of the Warrants			$ 300,000	2,200,000	$ 1,400,000
Period warrants are exercisable			5 years		5 years
Exercisable warrants (in shares) (up to) | shares			134,667												134,667				134,667
Inducement loss															$ 1,889,000			0
Change in the fair value of derivative liabilities															(3,186,000)			(1,258,000)
Paid-in-kind interest	$ 24,500,000
Redeemable, Convertible Preferred Stock
Debt Instrument [Line Items]
Preferred stock, convertible, shares issuable (in shares) | shares	17,082,285
Series D Preferred Stock
Debt Instrument [Line Items]
Preferred stock, convertible, shares issuable (in shares) | shares	17,082,285
2023 Series A Unsecured Convertible Notes for Series B Senior Unsecured Convertible Notes
Debt Instrument [Line Items]
Debt issuance costs															1,400,000				$ 1,400,000
Fair value of embedded derivative liability						$ 2,000,000.0
Derivative liability						13,500,000
Remeasured derivative liability																		2,800,000
Gain on change in fair value of derivative																		4,000,000.0
Revolving Credit Facility
Debt Instrument [Line Items]
Change in the fair value of derivative liabilities																				5,600,000
Term Loan
Debt Instrument [Line Items]
Aggregate principal amount																$ 83,500,000
Convertible Notes Payable
Debt Instrument [Line Items]
Unamortized discount			$ 14,600,000
Partial extinguishment of equity component			16,200,000
Extinguishment gain																11,800,000
Lender fees			1,800,000
Third party fees			2,200,000
Equity component recorded in APIC																1,000,000.0
Gain (loss) on restructuring																1,200,000
Debt conversion, shares issued (in shares) | shares	85,412
Convertible Notes Payable | Redeemable, Convertible Preferred Stock
Debt Instrument [Line Items]
Debt conversion, shares issued (in shares) | shares	85,412
Line of Credit
Debt Instrument [Line Items]
Interest rate, effective percentage					4.25%
Liquidity covenant compliance					$ 10,000,000.0
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount															$ 25,000,000	25,000,000.0			$ 25,000,000	25,000
Debt issuance costs									$ 300,000
Unamortized discount									500,000
Proceeds from Term Loan 2023							$ 2,500,000		15,000,000.0				$ 5,000,000.0	$ 5,000,000.0
Line of credit maximum borrowing capacity									25,000,000.0
Repayment fee												$ 100,000
Line of Credit | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate															3.75%
Line of Credit | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					1.50%
Line of Credit | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					5.50%
Line of Credit | Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					4.50%										2.75%
Line of Credit | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount									80,000,000.0
Debt issuance costs									800,000
Unamortized discount									$ 1,800,000
Covenant, revenue required to attain															$ 125,000,000.0
Line of Credit | Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate															8.75%
Line of Credit | Term Loan | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					1.50%
Line of Credit | Term Loan | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					13.00%
Line of Credit | Term Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					12.00%										7.75%
Convertible Note 2019 | Convertible Notes Payable
Debt Instrument [Line Items]
Stated interest rate										3.75%
Debt, transfer										$ 75,100,000
Convertible Note 2023 | Convertible Notes Payable
Debt Instrument [Line Items]
Stated interest rate										4.75%
Debt, transfer										$ 75,100,000
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares										$ 44.50
Settlement conversion price (dollars per share) | $ / shares										$ 35.60
Debt issuance costs										$ 1,600,000
Unamortized discount										$ 19,000,000.0
Interest rate, effective percentage										11.90%
Senior Notes, due December 2019 | Convertible Notes Payable
Debt Instrument [Line Items]
Gross cash proceeds						$ 29,300,000
2023 Term Loans | Line of Credit | Term Loan
Debt Instrument [Line Items]
Number of term loans | loan									3
Initial Term Loan
Debt Instrument [Line Items]
Paid-in-kind interest option term															24 months
Increase to principal balance															$ 2,000,000.0
Initial Term Loan | Minimum
Debt Instrument [Line Items]
Interest rate, effective percentage															16.60%				16.60%
Initial Term Loan | Maximum
Debt Instrument [Line Items]
Interest rate, effective percentage															17.70%				17.70%
Initial Term Loan | Line of Credit | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount									$ 50,000,000.0
Delayed Draw Term Loan A | Term Loan
Debt Instrument [Line Items]
Debt issuance costs									500,000
Proceeds from Term Loan 2023											$ 10,000,000.0
Amount drawn								$ 20,000,000.0
Delayed Draw Term Loan A | Term Loan | Minimum
Debt Instrument [Line Items]
Interest rate, effective percentage															9.60%				9.60%
Delayed Draw Term Loan A | Term Loan | Maximum
Debt Instrument [Line Items]
Interest rate, effective percentage															10.90%				10.90%
Delayed Draw Term Loan A | Line of Credit | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount									30,000,000.0
Delayed Draw Term Loan B | Line of Credit | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount									$ 15,000,000.0
Partial extinguishment of Convertible 3.75% Senior Notes											15,000,000.0
Series B Senior Unsecured Convertible Notes | Convertible Notes Payable
Debt Instrument [Line Items]
Stated interest rate						7.00%
Aggregate principal amount				$ 34,405,000							$ 34,405,000							$ 34,405,000
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares				$ 7.20		$ 7.20					$ 7.20							$ 7.20
Debt issuance costs						$ 2,300,000
Increase to principal balance															$ 0			$ 0
Gross cash proceeds						34,400,000
Series D conversion gain		$ 500,000
Extinguishment of liability component			$ 500,000
Net proceeds from the offering						$ 26,900,000
PIK interest						8.00%
Discount on principal amount		31.90%
Series B Senior Unsecured Convertible Notes | Convertible Notes Payable | Series B Convertible Note Holders
Debt Instrument [Line Items]
Stated interest rate			7.00%
PIK interest			8.00%
Discount on principal amount			10.00%
Series B Senior Unsecured Convertible Notes | Convertible Notes Payable | 2023 Note Holders
Debt Instrument [Line Items]
Discount on principal amount			55.00%
Series B Senior Unsecured Convertible Notes | Convertible Notes Payable | 2023 Series A Unsecured Convertible Notes for Series B Senior Unsecured Convertible Notes
Debt Instrument [Line Items]
Debt issuance costs															200,000				$ 200,000
Series D conversion gain						$ 5,100,000
Carrying value of original debt															7,200,000				7,200,000
Fair value of embedded derivative liability															2,000,000.0				2,000,000.0
Future undiscounted cash flows															$ 6,800,000				$ 6,800,000
Series A Unsecured Convertible Notes due 2023 | Convertible Notes Payable
Debt Instrument [Line Items]
Series D conversion gain		$ 59,000,000.0
Extinguishment of liability component			$ 19,300,000
Discount on principal amount		53.40%
Series A Unsecured Convertible Notes due 2023 | Convertible Notes Payable | 2023 Series A Unsecured Convertible Notes for Series B Senior Unsecured Convertible Notes
Debt Instrument [Line Items]
Original exchange amount						$ 9,000,000.0
Senior Notes, Due 2023
Debt Instrument [Line Items]
Interest rate at period end															27.40%				27.40%
Senior Notes, due February 2023 | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount															$ 83,515,000				$ 83,515,000	$ 102,905,000
2023 Series D Convertible Notes | Convertible Notes Payable
Debt Instrument [Line Items]
Stated interest rate			9.50%																		18.00%
Aggregate principal amount			$ 13,800,000
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares			$ 2.78
Increase to principal balance															0.0
Gross cash proceeds			$ 10,000,000.0
Original exchange amount			$ 32,300,000
Default threshold percentage			25.00%
Series D conversion gain	$ 50,300,000
Consecutive trading days | loan			10
Conversion premium percentage			20.00%
Debt conversion, shares issued (in shares) | shares	29,862,641
Sale of stock, price per share (usd per share) | $ / shares	$ 0.90
2023 Series D Convertible Notes | Convertible Notes Payable | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Conversion price percentage			100.00%
2023 Series D Convertible Notes | Convertible Notes Payable | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Conversion price percentage			75.00%
2023 Series D Convertible Notes | Convertible Notes Payable | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Conversion price percentage			50.00%
2023 Series D Convertible Notes | Convertible Notes Payable | Series B Convertible Note Holders
Debt Instrument [Line Items]
Series D conversion gain			$ 35,900,000
2023 Series D Convertible Notes | Convertible Notes Payable | 2023 Note Holders
Debt Instrument [Line Items]
Original exchange amount			3,700,000
Series D conversion gain			$ 8,200,000
2023 Series D Convertible Notes | Convertible Notes Payable | Maximum
Debt Instrument [Line Items]
Stated interest rate			18.00%
2023 Series D Convertible Notes | Convertible Notes Payable
Debt Instrument [Line Items]
Aggregate principal amount		$ 50,100,000
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares		$ 1.50
Debt issuance costs																$ 600,000
Extinguishment gain															5,400,000
Original exchange amount															$ 3,100,000
Default threshold percentage															25.00%
Series D conversion gain		$ 27,900,000																	$ 27,600,000
Debt conversion, shares issued (in shares) | shares																			18,400,000
Conversion rate															666.6667%
Inducement loss															$ 1,900,000
2023 Series D Convertible Notes | Convertible Notes Payable | 2023 Series D Convertible Notes in exchange for 2023 Series A Convertible Notes
Debt Instrument [Line Items]
Original exchange amount		27,500,000
2023 Series D Convertible Notes | Convertible Notes Payable | 2023 Series D Convertible Notes in Exchange for 2023 Series B Convertible Notes
Debt Instrument [Line Items]
Original exchange amount		$ 400,000
Delayed Draw Term Loan C | Line of Credit | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount	$ 4,600,000