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Operating Expenses, Stock Compensation Expense (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) shares $ / shares | Dec. 31, 2020 USD ($) shares $ / shares | Dec. 31, 2019 USD ($) shares $ / shares
Operating Expense [Abstract] |  |  |
Expense recognized from stock compensation | $ | $ 4,371 | $ 4,792 | $ 2,532
Stock compensation expense [Abstract] |  |  |
Contractual life for outstanding stock compensation series | 9 months |  |
Vesting value $8.22 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares | $ 8.22 | $ 8.22 |
Number of shares vested (in shares) | shares | 435,960 | 32,445 |
Vesting value $4.25 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares | $ 4.25 | $ 4.25 |
Number of shares vested (in shares) | shares | 163,764 | 125,649 |
Vesting value $5.52 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares | $ 5.52 |  |
Number of shares vested (in shares) | shares | 120,986 |  |
Vesting value $3.22 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares | $ 3.22 |  |
Number of shares vested (in shares) | shares | 120,986 |  |
Vesting value $3.56 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares |  | $ 3.56 |
Number of shares vested (in shares) | shares |  | 207,786 |
Vesting value $4.60 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares |  | $ 4.60 | $ 4.60
Number of shares vested (in shares) | shares |  | 235,650 | 10,435
Vesting value $4.61 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares |  |  | $ 4.61
Number of shares vested (in shares) | shares |  |  | 281,094
Vesting value $2.30 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares |  |  | $ 2.30
Number of shares vested (in shares) | shares |  |  | 212,823
Vesting value $3.04 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares |  |  | $ 3.04
Number of shares vested (in shares) | shares |  |  | 206,118
Vesting value $3.92 [Member] |  |  |
Stock compensation expense [Abstract] |  |  |
Fair value of shares vested (in dollars per share) | $ / shares |  |  | $ 3.92
Number of shares vested (in shares) | shares |  |  | 80,101

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