XML 48 R34.htm IDEA: XBRL DOCUMENT
v3.21.2

Investments (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
Investments |
Schedule of securities classified as held-to-maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | (in thousands)
Corporate bonds | ​ | $ | 513 | ​ | $ | — | ​ | $ | (1) | ​ | $ | 512
Municipal bonds | ​ | ​ | 2,527 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,527
Total investments as of September 30, 2021 | ​ | $ | 3,040 | ​ | $ | — | ​ | $ | (1) | ​ | $ | 3,039
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate bonds | ​ | $ | 1,560 | ​ | $ | — | ​ | $ | (1) | ​ | $ | 1,559
Municipal bonds | ​ | ​ | 2,297 | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | 2,296
Total investments as of December 31, 2020 | ​ | $ | 3,857 | ​ | $ | — | ​ | $ | (2) | ​ | $ | 3,855

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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