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Supplemental Cash Flow Statement Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Supplemental non-cash Investing and Financing Activities |  |
Issuance of common stock upon conversion of preferred stock |  | $ 1,927
Issuance of warrants with term loan extensions / revolver draws |  | 809
Noncash preferred stock dividends |  | 345
Conversion of promissory notes |  | 10,031
Noncash preferred stock conversion expense |  | 3,932
Cash paid during the period for: |  |
Interest | 403 | 630
Income taxes, net | $ 25 | $ 34

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