| In millions, except per share items | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues: | | | | | | | | |
| Revenues | 245.1 | 266.3 | 270.6 | 247.9 | | | | |
| Total revenues | 248.5 | 272.0 | 276.1 | 254.2 | 186.7 | 178.3 | 96.2 | 74.2 |
| Total revenues growth | -8.7% | -1.5% | 8.6% | 36.1% | 4.7% | 85.3% | 29.7% | 15.1% |
| Cost of revenues, exclusive of depreciation and amortization shown below: | | | | | | | | |
| Cost of goods and services sold | | | | | | | | |
| Operating expenses: | | | | | | | | |
| Selling, general and administrative | 70.2 | 69.6 | 67.0 | 55.8 | 46.9 | 44.4 | 31.0 | 24.6 |
| Product development | 12.7 | 14.7 | 13.4 | 8.9 | 6.3 | 6.5 | 2.9 | 2.8 |
| Depreciation and amortization | 50.7 | 50.7 | 49.7 | 45.7 | 42.8 | 26.6 | 10.9 | 6.0 |
| Acquisition-related and integration costs | 0.4 | 0.8 | 1.6 | 3.3 | 1.6 | 4.8 | 3.8 | 1.7 |
| Loss from operations | -0.3 | 5.6 | -2.2 | -40.9 | -14.5 | -7.2 | -1.6 | 5.7 |
| Operating margin | -0.1% | 2.0% | -0.8% | -16.1% | -7.8% | -4.0% | -1.7% | 7.7% |
| |
| Other income (expense): | | | | | | | | |
| Interest income | 1.2 | 2.0 | 1.9 | 1.0 | 0.4 | 0.3 | 0.0 | 0.0 |
| Other (expense) income | -1.4 | -0.1 | 0.0 | -0.2 | 0.5 | 0.3 | 0.2 | 0.4 |
| Interest expense | -20.0 | -21.1 | -21.1 | -17.7 | -9.1 | -5.2 | -0.1 | -0.1 |
| Total other expense | -31.8 | -19.3 | -19.1 | -20.7 | -8.2 | -4.6 | -2.5 | 0.4 |
| Loss before income taxes | -32.2 | -13.7 | -21.3 | -61.6 | -22.7 | -11.8 | -4.1 | 6.1 |
| Income tax expense (benefit) | 1.7 | 4.4 | 4.7 | -0.4 | 0.5 | 1.2 | 0.4 | 1.3 |
| Tax rate | | | | 0.7% | | | | 21.4% |
| Net loss | -33.8 | -18.1 | -25.9 | -61.2 | -23.2 | -13.0 | -4.5 | 4.8 |
| Less: Net income attributable to noncontrolling interests | 0.1 | 0.3 | 0.3 | 0.1 | 0.3 | 0.3 | 0.2 | 0.2 |
| Net loss attributable to ORBCOMM Inc. | -33.9 | -18.4 | -26.2 | -61.3 | -23.5 | -13.3 | -4.7 | 4.6 |
| Net loss attributable to ORBCOMM Inc. common stockholders | -33.9 | -18.4 | -26.3 | -61.3 | -23.5 | -13.3 | -4.7 | 4.5 |
| |
| Per share information-basic: | | | | | | | | |
| Net loss attributable to ORBCOMM Inc. common stockholders | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Per share information-diluted: | | | | | | | | |
| Net loss attributable to ORBCOMM Inc. common stockholders | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Weighted average common shares outstanding: | | | | | | | | |
| Basic | 78.1 | 79.3 | 77.6 | 72.9 | 70.9 | 70.4 | 56.7 | 47.4 |
| Diluted | 78.1 | 79.3 | 77.6 | 72.9 | 70.9 | 70.4 | 56.7 | 48.8 |