Subsequent events	6 Months Ended
Jun. 30, 2022
Subsequent events.
Subsequent events	15. Subsequent events On July 15, 2022, the Borrowers entered into the second amendment (the “Second Amendment to LSA”) to the Loan and Security Agreement with Hercules (as amended by the First Amendment to LSA). Pursuant to the Second Amendment to LSA, among other amendments, (a) the rate at which the borrowings under the Loan Agreement bear interest was decreased and capped to be an annual rate equal to the lesser of (x) the greater of either (i) 8.05% and (ii) the Wall Street Journal prime rate plus 4.55% and (y) 9.05%, (b) the interest-only period was extended to April 1, 2025, (c) the Maturity Date was extended to July 1, 2025, and (d) the Borrowers may request additional term loans, subject to satisfaction of customary conditions, in an aggregate principal amount, including amounts already borrowed pursuant to the Loan Agreement and First Amendment to LSA, of up to $75.0 million on or before December 31, 2024.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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