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Fair value measurements (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Assets measured at fair value on recurring basis | The Company’s assets that are measured at fair value on a recurring basis within the fair value hierarchy are summarized as follows:
| December 31, 2020 |  | December 31, 2019
(in thousands) | Level 1 |  | Level 2 |  |  |  | Total |  | Level 1 |  | Level 2 |  |  |  | Total
Cash equivalents (1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 19,445 |  |  | $ | — |  |  |  |  | $ | 19,445 |  |  | $ | 4,413 |  |  | $ | — |  |  |  |  | $ | 4,413 |
Total cash equivalents | $ | 19,445 |  |  | $ | — |  |  |  |  | $ | 19,445 |  |  | $ | 4,413 |  |  | $ | — |  |  |  |  | $ | 4,413 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | — |  |  | $ | 14,847 |  |  |  |  | $ | 14,847 |
Total marketable securities | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | — |  |  | $ | 14,847 |  |  |  |  | $ | 14,847 |
(1) Included in cash and cash equivalents in the accompanying Consolidated Balance Sheets. Cash balances were $308.2 million, including $2.0 million of restricted cash, and $145.9 million as of December 31, 2020 and 2019, respectively.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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