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Selected Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2021
Selected Balance Sheet Information |
Schedule of prepaid expenses and other current assets | PREPAID EXPENSES AND OTHER CURRENT ASSETS (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2021 | ​ | 2020
Prepaid insurance | ​ | $ | 803 | ​ | $ | 639
Prepaid clinical research organizations | ​ | ​ | 458 | ​ | ​ | 470
Prepaid consulting, subscriptions and other expenses | ​ |  | 272 | ​ |  | 90
Stock sales receivable | ​ | ​ | — | ​ | ​ | 469
Prepaid manufacturing expenses | ​ | ​ | — | ​ | ​ | 39
​ | ​ |  | ​ | ​ |  | ​
Total | ​ | $ | 1,533 | ​ | $ | 1,707
​
Schedule of property, plant and equipment, net | PROPERTY AND EQUIPMENT (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2021 | ​ | 2020
Computers and office equipment | ​ | $ | 827 | ​ | $ | 813
Leasehold improvements | ​ |  | 94 | ​ |  | 439
Software | ​ |  | 11 | ​ |  | 11
​ | ​ |  | 932 | ​ |  | 1,263
Less: accumulated depreciation and amortization | ​ |  | (831) | ​ |  | (1,089)
​ | ​ |  |  | ​ |  |
Total | ​ | $ | 101 | ​ | $ | 174
Schedule of accrued expenses | ACCRUED EXPENSES (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2021 | ​ | 2020
Accrued vendor payments | ​ | $ | 1,028 | ​ | $ | 225
Accrued clinical consulting services | ​ | ​ | 696 | ​ | ​ | 700
Accrued manufacturing costs | ​ | ​ | 204 | ​ | ​ | —
​ | ​ |  |  | ​ |  |
Total | ​ | $ | 1,928 | ​ | $ | 925
Schedule of accrued employee benefits | ACCRUED EMPLOYEE BENEFITS (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2021 | ​ | 2020
Accrued bonus expense | ​ | $ | 886 | ​ | $ | 724
Accrued vacation expense | ​ |  | 92 | ​ |  | 144
​ | ​ |  |  | ​ | ​ |
Total | ​ | $ | 978 | ​ | $ | 868

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