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DSIT Solutions, Ltd. ('DSIT') - Schedule of Equity Investment Balance in DSIT (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Net income (loss) before income taxes for reportable segments |  |
Balance at the Beginning | $ 5,800 | $ 5,658
Acorn's share of net income in DSIT | 33 | 450
Impairment | (33) | (308)
Sale of Investment in DSIT | (5,800) |
Balance at the ending |  | $ 5,800

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