In millions, except per share items | Sep-30-20 | Jun-30-20 | Mar-31-20 | Dec-31-19 | Sep-30-19 | Jun-30-19 | Mar-31-19 | Dec-31-18 |
| 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
Revenue, net | 41.5 | 39.0 | 36.8 | 46.7 | 42.3 | 42.0 | 38.8 | 49.6 |
Revenue, net growth | -1.8% | -7.1% | -5.1% | -5.9% | -2.4% | -0.3% | 5.7% | -32.8% |
Operating expenses: | | | | | | | | |
Cost of revenue | 20.8 | 20.6 | 22.5 | 23.1 | 25.5 | 26.3 | 25.2 | 26.5 |
Selling, general and administrative expenses | 13.8 | 14.7 | 13.5 | 14.4 | 13.5 | 15.7 | 13.9 | 13.9 |
Depreciation of property, equipment and software assets | 1.3 | 2.0 | 2.1 | | 2.6 | 2.4 | 2.2 | |
Amortization of intangible assets | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
Impairment charges | 0.6 | | | | | | | |
Acquisition-related adjustment income | | | | | -0.3 | | | 0.0 |
Operating income (loss) from continuing operations | 4.3 | 0.9 | -2.1 | -4.5 | -0.1 | -3.3 | -3.4 | 6.3 |
Operating margin | 10.3% | 2.3% | -5.8% | -9.6% | -0.1% | -8.0% | -8.8% | 12.7% |
Foreign currency transaction losses on short-term intercompany balances | -0.4 | -0.8 | 1.5 | | 0.9 | -0.1 | 0.2 | |
Interest expense, net | 0.2 | 0.3 | 0.3 | 0.4 | 0.4 | 0.6 | 0.5 | 0.4 |
Other loss (income) | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Income (loss) from continuing operations before income tax | 4.5 | 1.4 | -3.9 | -4.1 | -1.3 | -3.9 | -4.1 | 5.7 |
Income tax expense | 1.5 | 1.0 | 0.0 | 0.2 | 0.2 | 0.3 | 0.2 | -0.3 |
Tax rate | 32.4% | 70.6% | 1.1% | | | | | |
Net income (loss) from continuing operations | 3.0 | 0.4 | -3.9 | -4.4 | -1.5 | -4.2 | -4.2 | 5.9 |
|
Discontinued operations: | | | | | | | | |
Income from discontinued operations | | | | 0.0 | 0.9 | -0.1 | -0.2 | 1.9 |
Net income from discontinued operations | | | | 0.0 | 0.9 | -0.1 | -0.2 | 1.9 |
Net income (loss) | 3.0 | 0.4 | -3.9 | -4.4 | -0.6 | -4.3 | -4.4 | 7.9 |
|
Basic income (loss) per common share (Note 2): | | | | | | | | |
Basic income (loss) from continuing operations (in usd per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Basic income from discontinued operations (in usd per share) | | | | | 0.0 | | 0.0 | 0.0 |
|
Total basic income (loss) per share (in usd per share) | $0.13 | $0.02 | ($0.17) | ($0.19) | ($0.03) | ($0.18) | ($0.20) | $0.34 |
|
Diluted income (loss) per common share (Note 2): | | | | | | | | |
Diluted income (loss) from continuing operations (in usd per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Diluted income from discontinued operations (in usd per share) | | | | | 0.0 | | 0.0 | 0.0 |
Total diluted income (loss) per common share (in usd per share) | $0.13 | $0.02 | ($0.17) | ($0.19) | ($0.03) | ($0.18) | ($0.20) | $0.34 |
|
Weighted-average common shares outstanding (Note 2): | | | | | | | | |
Basic (in shares) | 22.7 | 22.6 | 22.5 | 22.7 | 22.8 | 22.8 | 22.6 | 22.8 |
Diluted (in shares) | 23.0 | 22.7 | 22.5 | 22.7 | 22.8 | 22.8 | 22.6 | 23.4 |
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Revenue, Product and Service [Extensible List] | | | | | | | | |