Loan Agreements - Additional Information (Detail) - USD ($)				1 Months Ended		3 Months Ended		12 Months Ended
	Dec. 17, 2020	Apr. 22, 2020	Feb. 13, 2019	May 31, 2021	Oct. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Apr. 08, 2020	Apr. 30, 2019
RPA [Member] | SWK Funding LLC [Member]
Term Loan Agreement [Line Items]
Upfront cash payment	$ 16,500,000
Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Amortization of debt discount (premium)						$ 147,000	$ 171,000
CRG Servicing LLC [Member]
Term Loan Agreement [Line Items]
Restriction of the right to capitalize a portion of quarterly interest in the event of a loan default						So long as no default has occurred and is continuing, the Company may elect on each applicable interest payment date to pay 2.5% of the 12.5% per annum interest as Paid In-Kind (“PIK”), whereby such PIK amount would be added to the aggregate principal amount and accrue interest at 12.5% per annum.
Upfront loan origination fee percentage			1.50%
Minimum liquidity amount			$ 5,000,000
Total debt discount			3,200,000
CRG Servicing LLC [Member] | Period One [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue			15,000,000
Annual minimum product revenue period						on January 1, 2019 and ending on December 31, 2019
CRG Servicing LLC [Member] | Period Two [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue			45,000,000
Annual minimum product revenue period						January 1, 2020 and ending on December 31, 2020
CRG Servicing LLC [Member] | Period Three [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue			80,000,000		$ 45,000,000
Annual minimum product revenue period						January 1, 2021 and ending on December 31, 2021
Incremental charges for issuance of waivers					$ 0
CRG Servicing LLC [Member] | Period Three [Member] | Scenario Forecast [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue				$ 25,000,000
CRG Servicing LLC [Member] | Period Four [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue			$ 90,000,000
Annual minimum product revenue period						January 1, 2022 and ending on December 31, 2022
CRG Servicing LLC [Member] | Loan Prepayment Prior to December 31, 2019 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage			10.00%
CRG Servicing LLC [Member] | Loan Prepayment after December 31, 2019 and Prior to December 31, 2020 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage			5.00%
CRG Servicing LLC [Member] | Loan prepayment after December 31, 2020 and prior to December 31, 2021 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage			3.00%
CRG Servicing LLC [Member] | Loan prepayment after December 31 2021 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage			0.00%
CRG Servicing LLC [Member] | Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Annual interest rate on term loan balance			12.50%
Proceeds from issuance of long-term debt							$ 0
Agreement date			Feb. 13, 2019
Senior secured term loan borrowing facility			$ 60,000,000
Term loan agreement, initial advance			$ 35,000,000
Maturity date			Dec. 31, 2023
Paid in Kind Interest Added to Principal						$ 0
Exit fee percentage payable upon repayment of the total secured term loan			6.00%
Upfront loan original fee payment, initial advance			$ 525,000
Reimbursement of lender's legal fees and other transaction costs			350,000
Exit fee accrued			2,100,000
Line of credit facility, legal and other transaction costs			591,000
Repayment of senior secured term loan	13,800,000
Payment of exit fee upon repayment of secured term loan	828,000
Payment of accrued and unpaid interest through the date of the secured term loan refinancing	378,000
Loss on extinguishment of debt								$ 905,000
CRG Servicing LLC [Member] | Senior Secured Term Loan [Member] | RPA [Member] | SWK Funding LLC [Member]
Term Loan Agreement [Line Items]
Upfront cash payment	$ 15,000,000.0
CRG Servicing LLC [Member] | Second Advance [Member]
Term Loan Agreement [Line Items]
Term loan agreement, additional loan advance										$ 15,000,000
Total debt discount			$ 1,100,000
CRG Servicing LLC [Member] | Second Advance [Member] | Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
One-time upfront financing fee percentage applied to borrowing amounts under the line of credit facility			1.50%
Upfront loan original fee payment, initial advance			$ 225,000
Exit fee accrued			$ 900,000
CRG Servicing LLC [Member] | Initial Advance [Member] | Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
One-time upfront financing fee percentage applied to borrowing amounts under the line of credit facility			1.50%
Upfront loan original fee payment, initial advance			$ 525,000
Paycheck Protection Program Loan [Member] | Silicon Valley Bank [Member] | CARES Act [Member]
Term Loan Agreement [Line Items]
Loan amount									$ 2,000,000.0
Loan proceeds date		Apr. 22, 2020
Annual interest rate on term loan balance		1.00%				1.00%
Debt instrument term		2 years
Debt instrument, maturity date		Apr. 21, 2022
Debt Instrument Description						The Paycheck Protection Program Flexibility Act of 2020 (the “PPP Flexibility Act”), enacted on June 5, 2020, amended the Paycheck Protection Program, among others, as follows: (i) extended the covered period from 8 weeks to the earlier of 24 weeks from the date the PPP Loan is originated and December 31, 2020, during which PPP funds needed to be expended in order to be forgiven. A borrower may submit a loan forgiveness application any time on or before the maturity date of the loan – including before the end of the covered period – if the borrower has used all of the loan proceeds for which the borrower is requesting forgiveness; (ii) at least 60% of PPP funds must be spent on payroll costs, with the remaining 40% available to spend on other eligible expenses; (iii) payments are deferred until the date on which the amount of forgiveness determined is remitted to the lender. If a borrower fails to seek forgiveness within 10 months after the last day of its covered period, then payments will begin on the date that is 10 months after the last day of the covered period. In addition, the PPP Flexibility Act modified the CARES Act by increasing the maturity date for loans made after the effective date from two years to a minimum maturity of five years from the date on which the borrower applies for loan forgiveness. Existing PPP loans made before the new legislation retain their original two-year term, but may be renegotiated between a lender and a borrower to match the 5-year term permitted under the PPP Flexibility Act.
Proceeds from issuance of long-term debt		$ 2,000,000.0
Accrued interest expense						$ 5,000