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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Statement Of Financial Position [Abstract] |  |
Account receivable allowance | $ 642 | $ 557
Shares issued | 37,023,114 | 34,494,441
Shares outstanding | 37,023,114 | 34,494,441

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