XML 26 R13.htm IDEA: XBRL DOCUMENT
v3.22.1

INVESTMENTS | 3 Months Ended
--- | ---
Mar. 31, 2022
INVESTMENTS |
INVESTMENTS |
5. | INVESTMENTS
The following table summarizes the Company’s investments at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Continuous | ​ | Continuous
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​ | ​ | Loss Position | ​ | Loss Position
​ | ​ | Amortized | ​ | Holding | ​ | Holding | ​ | Fair | ​ | less than 12 | ​ | greater than 12
March 31, 2022 |  | Cost |  | Gains |  | Losses |  | Value |  | Months |  | Months
Available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Short-term: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial paper | ​ | $ | 276,413 | ​ | $ | — | ​ | $ | — | ​ | $ | 276,413 | ​ | $ | — | ​ | $ | —
Certificates of deposit | ​ | ​ | 37,010 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 37,010 | ​ | ​ | — | ​ | ​ | —
Municipal securities | ​ |  | 168,958 | ​ | ​ | 2 | ​ | ​ | 482 | ​ | ​ | 168,478 | ​ | ​ | 482 | ​ | ​ | ​
U.S. government agency securities | ​ |  | 78,831 | ​ |  | — | ​ |  | 342 | ​ |  | 78,489 | ​ |  | 342 | ​ |  | —
U.S. treasuries | ​ | ​ | 1,161,042 | ​ |  | — | ​ |  | 3,784 | ​ |  | 1,157,258 | ​ |  | 3,784 | ​ |  | —
Long-term: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agency securities | ​ | ​ | 21,455 | ​ | ​ | — | ​ | ​ | 158 | ​ | ​ | 21,297 | ​ | ​ | 158 | ​ | ​ | —
Municipal securities | ​ | ​ | 5,284 | ​ | ​ | ​ | ​ | ​ | 18 | ​ | ​ | 5,266 | ​ | ​ | 18 | ​ | ​ | ​
U.S. treasuries | ​ | ​ | 39,313 | ​ | ​ | — | ​ | ​ | 224 | ​ | ​ | 39,089 | ​ | ​ | 224 | ​ | ​ | —
Total | ​ | $ | 1,788,306 | ​ | $ | 2 | ​ | $ | 5,008 | ​ | $ | 1,783,300 | ​ | $ | 5,008 | ​ | $ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Continuous | ​ | Continuous
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​ | ​ | Loss Position | ​ | Loss Position
​ | ​ | Amortized | ​ | Holding | ​ | Holding | ​ | Fair | ​ | less than 12 | ​ | greater than 12
December 31, 2021 |  | Cost |  | Gains |  | Losses |  | Value |  | Months |  | Months
Available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Short-term: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial paper | ​ | $ | 334,077 | ​ | $ | — | ​ | $ | — | ​ | $ | 334,077 | ​ | $ | — | ​ | $ | —
Certificates of deposit | ​ | ​ | 44,502 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 44,502 | ​ | ​ | — | ​ | ​ | —
Municipal securities | ​ |  | 666 | ​ |  | — | ​ |  | — | ​ |  | 666 | ​ |  | — | ​ |  | —
U.S. government agency securities | ​ |  | 62,687 | ​ |  | — | ​ |  | 26 | ​ |  | 62,661 | ​ |  | 26 | ​ |  | —
U.S. treasuries | ​ | ​ | 1,308,536 | ​ | ​ | 2 | ​ | ​ | 717 | ​ | ​ | 1,307,821 | ​ | ​ | 717 | ​ | ​ | —
Long-term: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agency securities | ​ | ​ | 12,500 | ​ | ​ | — | ​ | ​ | 24 | ​ | ​ | 12,476 | ​ | ​ | 24 | ​ | ​ | —
U.S. treasuries | ​ | ​ | 87,133 | ​ | ​ | — | ​ | ​ | 190 | ​ | ​ | 86,943 | ​ | ​ | 190 | ​ | ​ | —
Total | ​ | $ | 1,850,101 | ​ | $ | 2 | ​ | $ | 957 | ​ | $ | 1,849,146 | ​ | $ | 957 | ​ | $ | —
​ During the three-months ended March 31, 2022 and 2021, realized gains or losses recognized on the sale of investments were not significant. The Company’s investments at March 31, 2022 and December 31, 2021 carried investment grade credit ratings. The following table summarizes the underlying contractual maturities of the Company’s investments at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2022 | ​ | December 31, 2021
​ |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Less than 1 year: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial paper | ​ | $ | 276,413 | ​ | $ | 276,413 |  | $ | 334,077 | ​ | $ | 334,077
Municipal securities | ​ |  | 168,958 | ​ |  | 168,478 |  |  | 666 | ​ |  | 666
U.S. government agency securities | ​ |  | 78,831 | ​ |  | 78,489 |  |  | 62,687 | ​ |  | 62,661
Certificates of deposit | ​ |  | 37,010 | ​ |  | 37,010 |  |  | 44,502 | ​ |  | 44,502
U.S. treasuries | ​ | ​ | 1,161,042 | ​ | ​ | 1,157,258 | ​ | ​ | 1,308,536 | ​ | ​ | 1,307,821
Due 1 - 10 years: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. treasuries | ​ |  | 39,313 | ​ |  | 39,089 |  |  | 87,133 | ​ |  | 86,943
Municipal securities | ​ | ​ | 5,284 | ​ | ​ | 5,266 | ​ | ​ | — | ​ | ​ | —
U.S. government agency securities | ​ |  | 21,455 | ​ |  | 21,297 |  |  | 12,500 | ​ |  | 12,476
Total | ​ | $ | 1,788,306 | ​ | $ | 1,783,300 |  | $ | 1,850,101 | ​ | $ | 1,849,146
​

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

X
- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
Name: | us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration