CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Depreciation and amortization, nonproduction | $ 163 | $ 177 | $ 530 | $ 498 |
Stock-based compensation expense | 1,355 | 1,077 | 3,907 | 3,732 |
Selling, general and administrative expenses | ||||
Stock-based compensation expense | 1,254 | 1,011 | 3,521 | 3,356 |
System rental | ||||
Depreciation and amortization, production | 6,250 | 6,052 | 18,578 | 18,087 |
Stock-based compensation expense | 8 | (14) | 20 | 16 |
System services | ||||
Depreciation and amortization, production | 234 | 172 | 596 | 803 |
Stock-based compensation expense | 89 | 76 | 349 | 349 |
Transloading services | ||||
Depreciation and amortization, production | 0 | 0 | 0 | 411 |
Stock-based compensation expense | 4 | 4 | 17 | 11 |
Inventory software services | ||||
Depreciation and amortization, production | $ 195 | $ 193 | $ 584 | $ 579 |