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v3.21.1

Cash, Cash Equivalents and Investments (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Cash, cash equivalents and investments [Abstract] |  |
Cash | $ 72,602,000 | $ 26,892,000
Cash equivalents [Abstract] |  |
Total cash and cash equivalents | 72,602,000 | 26,892,000
Amortized Cost | 5,963,000 | 9,430,000
Cash, cash equivalents and investments, amortized costs | 78,565,000 | 36,322,000
Gross Unrealized Gain | 5,000 | 6,000
Gross Unrealized (Loss) | (2,000) | (9,000)
Fair Value | 5,966,000 | 9,427,000
Cash, cash equivalents and investments, amortized costs | 78,568,000 | 36,319,000
Contractual maturities on investments, amortized cost basis [Abstract] |  |
Due within 1 year | 240,000 | 9,430,000
Due after 1 through 5 years | 5,723,000 |
Investments, amortized cost | 5,963,000 | 9,430,000
Contractual maturities on investments, fair value basis [Abstract] |  |
Due within 1 year | 240,000 | 9,427,000
Due after 1 through 5 years | 5,726,000 |
Investments, fair value | 5,966,000 | 9,427,000
Debt Securities, Available-for-sale, Unrealized Loss | 2,000 |
Total Investments |  |
Cash equivalents [Abstract] |  |
Amortized Cost | 5,963,000 | 9,430,000
Gross Unrealized Gain | 5,000 | 6,000
Gross Unrealized (Loss) | (2,000) | (9,000)
Fair Value | 5,966,000 | 9,427,000
Contractual maturities on investments, amortized cost basis [Abstract] |  |
Investments, amortized cost | 5,963,000 | 9,430,000
Contractual maturities on investments, fair value basis [Abstract] |  |
Investments, fair value | 5,966,000 | 9,427,000
Certificates of Deposit [Member] |  |
Cash equivalents [Abstract] |  |
Amortized Cost | 2,880,000 | 2,400,000
Gross Unrealized Gain | 5,000 | 2,000
Fair Value | 2,885,000 | 2,402,000
Contractual maturities on investments, amortized cost basis [Abstract] |  |
Investments, amortized cost | 2,880,000 | 2,400,000
Contractual maturities on investments, fair value basis [Abstract] |  |
Investments, fair value | 2,885,000 | 2,402,000
Corporate Bonds [Member] |  |
Cash equivalents [Abstract] |  |
Amortized Cost | 3,083,000 | 7,030,000
Gross Unrealized Gain |  | 4,000
Gross Unrealized (Loss) | (2,000) | (9,000)
Fair Value | 3,081,000 | 7,025,000
Contractual maturities on investments, amortized cost basis [Abstract] |  |
Investments, amortized cost | 3,083,000 | 7,030,000
Contractual maturities on investments, fair value basis [Abstract] |  |
Investments, fair value | $ 3,081,000 | $ 7,025,000

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