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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
Stock-Based Compensation [Abstract] |
Schedule of Stock Based Compensation Expense | Stock based compensation has been reported within expense line items on the consolidated statement of operations for the three and nine months ended September 30, 2020 and 2021 as shown in the following table (in $000s): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Nine Months Ended |
​ |  | September 30, |  | September 30, |
​ |  | 2020 |  | 2021 |  | 2020 |  | 2021 | ​
General and administrative | ​ | $ | 85 | ​ | $ | 223 | ​ | $ | 192 | ​ | $ | 587 | ​
Research and development | ​ | ​ | 28 | ​ | $ | 96 | ​ | $ | 97 | ​ | $ | 266 | ​
Stock-based compensation costs before income taxes | ​ | $ | 113 | ​ | $ | 319 | ​ | $ | 289 | ​ | $ | 853 | ​
Schedule of Fair Value of the Stock Options Granted | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Nine months ended | ​ | Nine months ended
​ |  | September 30, 2020 |  | September 30, 2021
Expected term (years) |  | 5–6 |  | 5–6
Risk free interest rate |  | 0.270% – 0.425% | ​ | 0.420% – 1.000%
Volatility |  | 100% – 114% | ​ | 96 – 102%
Expected dividend yield over expected term |  | 0.00% | ​ | 0.00%
Schedule of Share Option Activity | A summary of the share option activity and related information is as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ |  | ​ |  | Weighted |  | Average |  | ​ | ​
​ |  | Number of |  | Average |  | Remaining |  | Aggregate
​ | ​ | Options |  | Exercise |  | Contractual | ​ | Intrinsic
​ | ​ | Outstanding | ​ | Price Per Share |  | Term (Years) | ​ | Value ($000)
Options outstanding at December 31, 2020 |  | 602,683 | ​ | $ | 11.01 |  | 9.39 | ​ | $ | 1,861
Granted |  | 154,653 | ​ | $ | 6.29 |  | — | ​ |  | —
Exercised |  | — | ​ | ​ | — |  | — | ​ |  | —
Cancelled/forfeited |  | (36,548) | ​ | $ | 11.03 |  | — | ​ |  | —
Options outstanding at September 30, 2021 |  | 720,788 | ​ | $ | 10.00 |  | 8.47 | ​ | $ | 547
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unvested at September 30, 2021 |  | 503,910 | ​ | $ | 4.72 |  | 9.25 | ​ | $ | 444
Vested and exercisable at September 30, 2021 |  | 216,878 | ​ | $ | 22.25 |  | 6.65 | ​ | $ | 104
Schedule of Restricted Stock Units Activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted | ​ | Weighted
​ |  | ​ |  | Average | ​ | Average
​ | ​ | Restricted |  | Grant Date | ​ | Remaining
​ | ​ | Stock Units | ​ | Value Per Share | ​ | Term
Restricted Stock Units outstanding at September 30, 2021 |  | 35,439 | ​ | $ | 8.82 | ​ | 9.01 years
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unvested at September 30, 2021 |  | 35,439 | ​ | $ | 8.82 | ​ | 9.01 years
Vested and exercisable at September 30, 2021 |  | — | ​ | $ | — | ​ | 9.01 years

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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