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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Reconciliation of Cash, Cash Equivalents and Restricted Cash | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets to the total end of period cash, cash equivalents and restricted cash reported within the Consolidated Statement of Cash Flows:
| December 31,
(in thousands) | 2020 |  | 2019
Cash and cash equivalents | $ | 61,031 |  |  | $ | 45,072 |
Restricted cash included in: |  |  |
Prepaid expenses and other current assets | 57 |  |  | — |
Non-current inventory and other | 525 |  |  | 578 |
Total cash, cash equivalents and restricted cash | $ | 61,613 |  |  | $ | 45,650 |
Net Product Sales | The Company’s net product sales consist of sales of HETLIOZ® and Fanapt®. Net sales by product for the years ended December 31, 2020, 2019 and 2018 were as follows:
| Year Ended December 31,
(in thousands) | 2020 |  | 2019 |  | 2018
HETLIOZ® net product sales | $ | 160,686 |  |  | $ | 142,980 |  |  | $ | 115,835 |
Fanapt® net product sales | 87,482 |  |  | 84,208 |  |  | 77,283 |
Total net product sales | $ | 248,168 |  |  | $ | 227,188 |  |  | $ | 193,118 |
Schedule of Major Customers that Represented More Than 10% of Total Revenues | The following table presents each major customer that represented more than 10% of total revenues for the years ended December 31, 2020, 2019 and 2018:
| Year Ended December 31,
Percent of Net Product Sales | 2020 |  | 2019 |  | 2018
Distributor A | 43 | % |  | 38 | % |  | 37 | %
Distributor B | 19 | % |  | 23 | % |  | 17 | %
Distributor C | 12 | % |  | 12 | % |  | 14 | %
Distributor D | 11 | % |  | 12 | % |  | 12 | %
Distributor E | 10 | % |  | 11 | % |  | 12 | %
Schedule of Major Customers that Represented More Than 10% of Accounts Receivable, Net | The following table presents each major customer that represented more than 10% of accounts receivable, net, as of December 31, 2020 and 2019:
| December 31,
Percent of Accounts Receivable, Net | 2020 |  | 2019
Distributor A | 22 | % |  | 21 | %
Distributor B | 13 | % |  | 21 | %
Distributor C | 22 | % |  | 18 | %
Distributor D | 20 | % |  | 16 | %
Distributor E | 13 | % |  | 18 | %
Summary of Product Return Allowance | The following table summarizes activity for product returns as of and for the years ended December 31, 2020, 2019 and 2018, all of which relates to sales of Fanapt®:
(in thousands) | Reserve for Product Returns
Balances at December 31, 2017 | $ | 4,119 |
Additions | 2,684 |
Credits/payments | (1,616) |
Balances at December 31, 2018 | 5,187 |
Additions | 3,138 |
Credits/payments | (2,205) |
Balances at December 31, 2019 | 6,120 |
Additions | 3,844 |
Credits/payments | (5,266) |
Balances at December 31, 2020 | $ | 4,698 |

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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