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Note 2 - Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
Net sales of: |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Products |  | $ | 49,613 |  |  | $ | 41,072 |  |  | $ | 146,402 |  |  | $ | 128,853 |
Tooling and Machinery |  |  | 405 |  |  |  | 887 |  |  |  | 1,149 |  |  |  | 2,210 |
Engineering services |  |  | 705 |  |  |  | 1,340 |  |  |  | 2,426 |  |  |  | 3,157 |
Total net sales |  | $ | 50,723 |  |  | $ | 43,299 |  |  | $ | 149,977 |  |  | $ | 134,220 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | Contract Liabilities |
|  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |
Deferred revenue - beginning of period |  | $ | 1,887 |  |  | $ | 2,574 |
Increases due to consideration received from customers |  |  | 736 |  |  |  | 2,255 |
Revenue recognized |  |  | (952 | ) |  |  | (2,883 | )
Deferred revenue - end of period |  | $ | 1,671 |  |  | $ | 1,946 |
|  | Contract Assets |
|  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |
Unbilled receivables - beginning of period |  | $ | 271 |  |  | $ | 72 |
Increases due to revenue recognized, not invoiced to customers |  |  | 1,461 |  |  |  | 2,223 |
Decreases due to customer invoicing |  |  | (1,509 | ) |  |  | (2,004 | )
Unbilled receivables - end of period |  | $ | 223 |  |  | $ | 291 |

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