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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares | 3 Months Ended | 9 Months Ended
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Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Statement of Stockholders' Equity [Abstract] |  |  |
Stock issued for acquisition of Filament (in shares) | 5,593,116 |  |
Dividend per share (usd per share) |  | $ 0.1275 | $ 0.1275

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