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Note 12 - Revenues (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year Ended December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Instruments, equipment, software and accessories |  | $ | 114,115 |  |  | $ | 97,473 |
Service, maintenance and warranty contracts |  |  | 4,789 |  |  |  | 4,627 |
Total revenues |  | $ | 118,904 |  |  | $ | 102,100 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Service contracts |  | $ | 1,976 |  |  | $ | 1,629 |
Customer advances |  |  | 2,290 |  |  |  | 2,142 |
Total deferred revenue |  | $ | 4,266 |  |  | $ | 3,771 |
Financing Receivable, Allowance for Credit Loss [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Balance, beginning of period |  | $ | 227 |  |  | $ | 325 |
Bad debt (credit) expense |  |  | (4 | ) |  |  | 17 |
Charge-offs and other |  |  | (87 | ) |  |  | (115 | )
Balance, end of period |  | $ | 136 |  |  | $ | 227 |
Schedule of Product Warranty Liability [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Balance, beginning of period |  | $ | 186 |  |  | $ | 252 |
Expense |  |  | 319 |  |  |  | 77 |
(Charges)/Credits |  |  | (265 | ) |  |  | (143 | )
Balance, end of period |  | $ | 240 |  |  | $ | 186 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249 + Details
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