XML 30 R20.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Leases (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2022
Leases |
Schedule of lease information | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |
Weighted average remaining lease term | ​ |  | 2.5 years | ​
Weighted average discount rate | ​ |  | 4.4 | %
​ | ​ | ​ | ​ | ​
Maturities of operating lease liabilities as of September 30, 2022 were as follows (in thousands): | ​ |  |  | ​
​ | ​ | ​ | ​ | ​
2022 (remaining) | ​ | $ | 14 | ​
2023 | ​ | ​ | 57 | ​
2024 | ​ | ​ | 46 | ​
2025 | ​ | ​ | 12 | ​
Total future lease payments | ​ |  | 129 | ​
Less: interest | ​ |  | (6) | ​
Present value of lease liabilities | ​ | $ | 123 | ​

X
- Definition Lessee, operating lease information including maturity. + References No definition available. + Details
Name: | hsdt_LesseeOperatingLeaseInformationIncludingMaturityTableTextBlock
Namespace Prefix: | hsdt_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration