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Loan Agreements - Additional Information (Detail) - USD ($) |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
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Jun. 16, 2021 | Dec. 17, 2020 | Apr. 22, 2020 | Feb. 13, 2019 | May 31, 2021 | Oct. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 08, 2020 | Apr. 30, 2019
Term Loan Agreement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  |  |  |  |  |  | $ 2,065,000 | $ (905,000) |  |
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) |  |  |  |  |  |  |  | $ 628,000 | 745,000 |  |
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 | $ 25,000,000 | $ 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 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% |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  |  |  |  |  |  |  | $ (905,000) |  |
Agreement date |  |  |  | Feb. 13, 2019 |  |  |  |  |  |  |
Senior secured term loan borrowing facility |  |  |  | $ 60,000,000 |  |  |  |  |  |  |
Term loan agreement, initial advance |  |  |  | $ 35,000,000 |  |  |  |  |  |  |
Proceeds from issuance of long-term debt |  |  |  |  |  |  | $ 0 |  |  |  |
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 |  |  |  |  |  |  |  |  |
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% |  |  |  |  |  |  |  |
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 |  |  |
Debt instrument, loan forgiveness amount | $ 2,000,000.0 |  |  |  |  |  |  |  |  |  |
Debt instrument, accrued interest forgiveness amount | $ 24,000 |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  |  |  |  |  |  | $ 2,100,000 |  |  |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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- Definition Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Date the debt instrument was issued, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Discussion of the facts and amounts pertaining to each failure to comply with an affirmative or negative covenant of a long-term debt instrument, including violating payment terms or an inability to meet certain minimum financial requirements or achieve or maintain certain financial ratios. The discussion would generally be expected to also include whether or not the failure can and will be overcome and a description of the terms of any waivers, including the amount of the waiver and the period of time covered by the waiver, and if reclassification of long-term debt to current has been made in the current balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(c)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123465755&loc=SL6230698-112601 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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