Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
May 12, 2021 |
Mar. 31, 2019 |
Jun. 30, 2021 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2018 |
|
| Loss Contingencies [Line Items] | ||||||
| Equipment purchases commitments | $ 1,400 | |||||
| Demand letter for payment | $ 900 | |||||
| Settlement agreement, payment to be received | $ 600 | |||||
| Consumer Night Vision, accrued invoices | $ 1,000 | |||||
| Other income (expense) | $ 396 | $ 200 | ||||
| Fully vested service period | 5 years | |||||
| Percentage employer matches employee contributions | 50.00% | |||||
| Percentage employer matches to a maximum qualified compensation | 3.00% | |||||
| Employer contributions | $ 100 | $ 100 | ||||
| Reclassification, Other [Member] | ||||||
| Loss Contingencies [Line Items] | ||||||
| Consumer Night Vision, accrued invoices | $ (1,000) | |||||
| Prepayment, writeoff | 300 | |||||
| Other income (expense) | $ 100 | |||||
| Government Funding [Member] | ||||||
| Loss Contingencies [Line Items] | ||||||
| Equipment purchases commitments | $ 20,500 | |||||